diff --git a/packages/redux-devtools-core/src/app/actions/index.ts b/packages/redux-devtools-core/src/app/actions/index.ts
index 05546088..ac79a39a 100644
--- a/packages/redux-devtools-core/src/app/actions/index.ts
+++ b/packages/redux-devtools-core/src/app/actions/index.ts
@@ -20,6 +20,9 @@ import {
   UPDATE_REPORTS,
   REMOVE_INSTANCE,
   SET_STATE,
+  GET_REPORT_ERROR,
+  GET_REPORT_SUCCESS,
+  ERROR,
 } from '../constants/actionTypes';
 import {
   AUTH_ERROR,
@@ -41,6 +44,7 @@ import { Action } from 'redux';
 import { Features, State } from '../reducers/instances';
 import { MonitorStateMonitorState } from '../reducers/monitor';
 import { LiftedAction } from 'redux-devtools-instrument';
+import { Data } from '../reducers/reports';
 
 let monitorReducer: (
   monitorProps: unknown,
@@ -95,49 +99,73 @@ export interface MonitorActionAction {
   ) => unknown;
   monitorProps: unknown;
 }
-interface JumpToStateAction {
+export interface JumpToStateAction {
   type: 'JUMP_TO_STATE';
   index: number;
   actionId: number;
 }
-interface JumpToActionAction {
+export interface JumpToActionAction {
   type: 'JUMP_TO_ACTION';
   index: number;
   actionId: number;
 }
-interface PauseRecordingAction {
+export interface PauseRecordingAction {
   type: 'PAUSE_RECORDING';
   status: boolean;
 }
-interface LockChangesAction {
+export interface LockChangesAction {
   type: 'LOCK_CHANGES';
   status: boolean;
 }
-export interface LiftedActionDispatchAction {
-  type: typeof LIFTED_ACTION;
-  message: 'DISPATCH';
-  action:
-    | JumpToStateAction
-    | JumpToActionAction
-    | PauseRecordingAction
-    | LockChangesAction;
+export interface ToggleActionAction {
+  type: 'TOGGLE_ACTION';
+}
+export interface RollbackAction {
+  type: 'ROLLBACK';
+}
+export interface SweepAction {
+  type: 'SWEEP';
+}
+export type DispatchAction =
+  | JumpToStateAction
+  | JumpToActionAction
+  | PauseRecordingAction
+  | LockChangesAction
+  | ToggleActionAction
+  | RollbackAction
+  | SweepAction;
+interface LiftedActionActionBase {
+  action?: DispatchAction | string | CustomAction;
+  state?: string;
   toAll?: boolean;
 }
-interface LiftedActionImportAction {
+export interface LiftedActionDispatchAction extends LiftedActionActionBase {
+  type: typeof LIFTED_ACTION;
+  message: 'DISPATCH';
+  action: DispatchAction;
+  toAll?: boolean;
+}
+interface LiftedActionImportAction extends LiftedActionActionBase {
   type: typeof LIFTED_ACTION;
   message: 'IMPORT';
   state: string;
   preloadedState: unknown | undefined;
 }
-interface LiftedActionActionAction {
+interface LiftedActionActionAction extends LiftedActionActionBase {
   type: typeof LIFTED_ACTION;
   message: 'ACTION';
-  action: Action<unknown>;
+  action: string | CustomAction;
+}
+interface LiftedActionExportAction extends LiftedActionActionBase {
+  type: typeof LIFTED_ACTION;
+  message: 'EXPORT';
+  toExport: boolean;
 }
 export type LiftedActionAction =
   | LiftedActionDispatchAction
   | LiftedActionImportAction
-  | LiftedActionActionAction;
+  | LiftedActionActionAction
+  | LiftedActionExportAction;
 export function liftedDispatch(
   action:
     | InitMonitorAction
@@ -237,8 +265,14 @@ export function pauseRecording(status: boolean): LiftedActionDispatchAction {
   };
 }
 
+export interface CustomAction {
+  name: string;
+  selected: number;
+  args: (string | undefined)[];
+  rest: string;
+}
 export function dispatchRemotely(
-  action: Action<unknown>
+  action: string | CustomAction
 ): LiftedActionActionAction {
   return { type: LIFTED_ACTION, message: 'ACTION', action };
 }
@@ -317,6 +351,7 @@ export function getReport(report: unknown): GetReportRequest {
 
 export interface ActionCreator {
   args: string[];
+  name: string;
 }
 
 interface LibConfig {
@@ -337,6 +372,7 @@ export interface RequestBase {
   computedStates?: string;
   // eslint-disable-next-line @typescript-eslint/ban-types
   payload?: {} | string;
+  liftedState?: Partial<State>;
 }
 interface InitRequest extends RequestBase {
   type: 'INIT';
@@ -344,6 +380,10 @@ interface InitRequest extends RequestBase {
 }
 interface ActionRequest extends RequestBase {
   type: 'ACTION';
+  isExcess: boolean;
+  nextActionId: number;
+  maxAge: number;
+  batched: boolean;
 }
 interface StateRequest extends RequestBase {
   type: 'STATE';
@@ -352,16 +392,22 @@ interface StateRequest extends RequestBase {
 interface PartialStateRequest extends RequestBase {
   type: 'PARTIAL_STATE';
   committedState: unknown;
+  maxAge: number;
 }
 interface LiftedRequest extends RequestBase {
   type: 'LIFTED';
 }
+export interface ExportRequest extends RequestBase {
+  type: 'EXPORT';
+  committedState: unknown;
+}
 export type Request =
   | InitRequest
   | ActionRequest
   | StateRequest
   | PartialStateRequest
-  | LiftedRequest;
+  | LiftedRequest
+  | ExportRequest;
 
 interface UpdateStateAction {
   type: typeof UPDATE_STATE;
@@ -445,10 +491,47 @@ interface UnsubscribeAction {
   channel: string;
 }
 
-interface EmitAction {
+export interface EmitAction {
   type: typeof EMIT;
   message: string;
-  id: string;
+  id?: string | false;
+  instanceId?: string;
+  action?: unknown;
+  state?: unknown;
+}
+
+interface ListRequest {
+  type: 'list';
+  data: Data;
+}
+interface AddRequest {
+  type: 'add';
+  data: Data;
+}
+interface RemoveRequest {
+  type: 'remove';
+  data: Data;
+  id: unknown;
+}
+type UpdateReportsRequest = ListRequest | AddRequest | RemoveRequest;
+interface UpdateReportsAction {
+  type: typeof UPDATE_REPORTS;
+  request: UpdateReportsRequest;
+}
+
+interface GetReportError {
+  type: typeof GET_REPORT_ERROR;
+  error: Error;
+}
+
+interface GetReportSuccess {
+  type: typeof GET_REPORT_SUCCESS;
+  data: { payload: string };
+}
+
+interface ErrorAction {
+  type: typeof ERROR;
+  payload: string;
 }
 
 export type StoreAction =
@@ -483,4 +566,8 @@ export type StoreAction =
   | SubscribeSuccessAction
   | SubscribeErrorAction
   | UnsubscribeAction
-  | EmitAction;
+  | EmitAction
+  | UpdateReportsAction
+  | GetReportError
+  | GetReportSuccess
+  | ErrorAction;
diff --git a/packages/redux-devtools-core/src/app/components/Settings/index.tsx b/packages/redux-devtools-core/src/app/components/Settings/index.tsx
index f50e95df..ff562ae2 100644
--- a/packages/redux-devtools-core/src/app/components/Settings/index.tsx
+++ b/packages/redux-devtools-core/src/app/components/Settings/index.tsx
@@ -21,7 +21,8 @@ class Settings extends Component<{}, State> {
 
   render() {
     return (
-      <Tabs
+      // eslint-disable-next-line @typescript-eslint/ban-types
+      <Tabs<{}>
         toRight
         tabs={this.tabs}
         selected={this.state.selected}
diff --git a/packages/redux-devtools-core/src/app/constants/socketActionTypes.ts b/packages/redux-devtools-core/src/app/constants/socketActionTypes.ts
index 95e00b6a..825dbb77 100644
--- a/packages/redux-devtools-core/src/app/constants/socketActionTypes.ts
+++ b/packages/redux-devtools-core/src/app/constants/socketActionTypes.ts
@@ -1,5 +1,14 @@
 import socketCluster from 'socketcluster-client';
 
+interface States {
+  CLOSED: 'closed';
+  CONNECTING: 'connecting';
+  OPEN: 'open';
+  AUTHENTICATED: 'authenticated';
+  PENDING: 'pending';
+  UNAUTHENTICATED: 'unauthenticated';
+}
+
 export const {
   CLOSED,
   CONNECTING,
@@ -7,7 +16,7 @@ export const {
   AUTHENTICATED,
   PENDING,
   UNAUTHENTICATED,
-} = socketCluster.SCClientSocket;
+} = (socketCluster.SCClientSocket as unknown) as States;
 export const CONNECT_REQUEST = 'socket/CONNECT_REQUEST';
 export const CONNECT_SUCCESS = 'socket/CONNECT_SUCCESS';
 export const CONNECT_ERROR = 'socket/CONNECT_ERROR';
diff --git a/packages/redux-devtools-core/src/app/containers/Actions.tsx b/packages/redux-devtools-core/src/app/containers/Actions.tsx
index 494adfa3..d813203c 100644
--- a/packages/redux-devtools-core/src/app/containers/Actions.tsx
+++ b/packages/redux-devtools-core/src/app/containers/Actions.tsx
@@ -1,5 +1,4 @@
 import React, { Component } from 'react';
-import PropTypes from 'prop-types';
 import { connect, ResolveThunks } from 'react-redux';
 import { Container } from 'devui';
 import SliderMonitor from './monitors/Slider';
@@ -55,16 +54,6 @@ class Actions extends Component<Props> {
   }
 }
 
-Actions.propTypes = {
-  liftedDispatch: PropTypes.func.isRequired,
-  liftedState: PropTypes.object.isRequired,
-  monitorState: PropTypes.object,
-  options: PropTypes.object.isRequired,
-  monitor: PropTypes.string,
-  dispatcherIsOpen: PropTypes.bool,
-  sliderIsOpen: PropTypes.bool,
-};
-
 const mapStateToProps = (state: StoreState) => {
   const instances = state.instances;
   const id = getActiveInstance(instances);
diff --git a/packages/redux-devtools-core/src/app/containers/DevTools.tsx b/packages/redux-devtools-core/src/app/containers/DevTools.tsx
index dad48085..cbfff2de 100644
--- a/packages/redux-devtools-core/src/app/containers/DevTools.tsx
+++ b/packages/redux-devtools-core/src/app/containers/DevTools.tsx
@@ -2,7 +2,6 @@ import React, { Component } from 'react';
 import { withTheme } from 'styled-components';
 import { LiftedAction, LiftedState } from 'redux-devtools-instrument';
 import { Action } from 'redux';
-import { Monitor } from 'redux-devtools';
 import getMonitor from '../utils/getMonitor';
 import { InitMonitorAction } from '../actions';
 import { Features, State } from '../reducers/instances';
@@ -22,13 +21,15 @@ interface Props {
 
 class DevTools extends Component<Props> {
   monitorProps: unknown;
-  Monitor?: Monitor<
-    unknown,
-    Action<unknown>,
-    LiftedState<unknown, Action<unknown>, unknown>,
-    unknown,
-    Action<unknown>
-  >;
+  Monitor?: React.ComponentType<
+    LiftedState<unknown, Action<unknown>, unknown>
+  > & {
+    update(
+      monitorProps: unknown,
+      state: unknown | undefined,
+      action: Action<unknown>
+    ): unknown;
+  };
   preventRender?: boolean;
 
   constructor(props: Props) {
@@ -41,6 +42,7 @@ class DevTools extends Component<Props> {
     this.monitorProps = monitorElement.props;
     this.Monitor = monitorElement.type;
 
+    // eslint-disable-next-line @typescript-eslint/unbound-method
     const update = this.Monitor!.update;
     if (update) {
       let newMonitorState;
@@ -51,7 +53,11 @@ class DevTools extends Component<Props> {
       ) {
         newMonitorState = monitorState;
       } else {
-        newMonitorState = update(this.monitorProps, undefined, {});
+        newMonitorState = update(
+          this.monitorProps,
+          undefined,
+          {} as Action<unknown>
+        );
         if (newMonitorState !== monitorState) {
           this.preventRender = true;
         }
@@ -95,9 +101,10 @@ class DevTools extends Component<Props> {
       ...this.props.liftedState,
       monitorState: this.props.monitorState,
     };
+    const MonitorAsAny = this.Monitor as any;
     return (
       <div className={`monitor monitor-${this.props.monitor}`}>
-        <this.Monitor
+        <MonitorAsAny
           {...liftedState}
           {...this.monitorProps}
           features={this.props.features}
diff --git a/packages/redux-devtools-core/src/app/containers/monitors/ChartMonitorWrapper.tsx b/packages/redux-devtools-core/src/app/containers/monitors/ChartMonitorWrapper.tsx
index 8c16e0e8..14613c96 100644
--- a/packages/redux-devtools-core/src/app/containers/monitors/ChartMonitorWrapper.tsx
+++ b/packages/redux-devtools-core/src/app/containers/monitors/ChartMonitorWrapper.tsx
@@ -35,6 +35,8 @@ class ChartMonitorWrapper extends Component<Props> {
 
   render() {
     return (
+      // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+      // @ts-ignore
       <ChartMonitor
         defaultIsVisible
         invertTheme
diff --git a/packages/redux-devtools-core/src/app/containers/monitors/Dispatcher.tsx b/packages/redux-devtools-core/src/app/containers/monitors/Dispatcher.tsx
index a8a4bb10..ee63668f 100644
--- a/packages/redux-devtools-core/src/app/containers/monitors/Dispatcher.tsx
+++ b/packages/redux-devtools-core/src/app/containers/monitors/Dispatcher.tsx
@@ -53,15 +53,15 @@ interface OwnProps {
 type Props = DispatchProps & OwnProps;
 
 interface State {
-  selected: string;
+  selected: 'default' | number;
   customAction: string;
-  args: unknown[];
+  args: (string | undefined)[];
   rest: string;
   changed: boolean;
 }
 
 class Dispatcher extends Component<Props, State> {
-  state = {
+  state: State = {
     selected: 'default',
     customAction:
       this.props.options.lib === 'redux' ? "{\n  type: ''\n}" : 'this.',
@@ -89,7 +89,7 @@ class Dispatcher extends Component<Props, State> {
     );
   }
 
-  selectActionCreator = (selected) => {
+  selectActionCreator = (selected: 'default' | 'actions-help' | number) => {
     if (selected === 'actions-help') {
       window.open(
         'https://github.com/zalmoxisus/redux-devtools-extension/blob/master/docs/' +
@@ -98,14 +98,14 @@ class Dispatcher extends Component<Props, State> {
       return;
     }
 
-    const args = [];
+    const args: string[] = [];
     if (selected !== 'default') {
       args.length = this.props.options.actionCreators![selected].args.length;
     }
     this.setState({ selected, args, rest: '[]', changed: false });
   };
 
-  handleArg = (argIndex) => (value) => {
+  handleArg = (argIndex: number) => (value: string) => {
     const args = [
       ...this.state.args.slice(0, argIndex),
       value || undefined,
@@ -114,26 +114,26 @@ class Dispatcher extends Component<Props, State> {
     this.setState({ args, changed: true });
   };
 
-  handleRest = (rest) => {
+  handleRest = (rest: string) => {
     this.setState({ rest, changed: true });
   };
 
-  handleCustomAction = (customAction) => {
+  handleCustomAction = (customAction: string) => {
     this.setState({ customAction, changed: true });
   };
 
   dispatchAction = () => {
     const { selected, customAction, args, rest } = this.state;
 
-    if (this.state.selected !== 'default') {
+    if (selected !== 'default') {
       // remove trailing `undefined` arguments
       let i = args.length - 1;
       while (i >= 0 && typeof args[i] === 'undefined') {
-        args.pop(i);
+        args.pop();
         i--;
       }
       this.props.dispatch({
-        name: this.props.options.actionCreators[selected].name,
+        name: this.props.options.actionCreators![selected].name,
         selected,
         args,
         rest,
@@ -182,7 +182,9 @@ class Dispatcher extends Component<Props, State> {
       );
     }
 
-    let options = [{ value: 'default', label: 'Custom action' }];
+    let options: { value: string | number; label: string }[] = [
+      { value: 'default', label: 'Custom action' },
+    ];
     if (actionCreators && actionCreators.length > 0) {
       options = options.concat(
         actionCreators.map(({ name, args }, i) => ({
diff --git a/packages/redux-devtools-core/src/app/containers/monitors/InspectorWrapper/ChartTab.tsx b/packages/redux-devtools-core/src/app/containers/monitors/InspectorWrapper/ChartTab.tsx
index ff6e3875..f2fc0b60 100644
--- a/packages/redux-devtools-core/src/app/containers/monitors/InspectorWrapper/ChartTab.tsx
+++ b/packages/redux-devtools-core/src/app/containers/monitors/InspectorWrapper/ChartTab.tsx
@@ -72,20 +72,20 @@ class ChartTab extends Component<Props> {
       style: {
         width: '100%',
         height: '100%',
-        node: {
+        node: ({
           colors: {
             default: theme.base0B,
             collapsed: theme.base0B,
             parent: theme.base0E,
           },
           radius: 7,
-        },
-        text: {
+        } as unknown) as string,
+        text: ({
           colors: {
             default: theme.base0D,
             hover: theme.base06,
           },
-        },
+        } as unknown) as string,
       },
       onClickText: this.onClickText,
     };
diff --git a/packages/redux-devtools-core/src/app/containers/monitors/InspectorWrapper/SubTabs.tsx b/packages/redux-devtools-core/src/app/containers/monitors/InspectorWrapper/SubTabs.tsx
index 00d97ffa..a70b2eae 100644
--- a/packages/redux-devtools-core/src/app/containers/monitors/InspectorWrapper/SubTabs.tsx
+++ b/packages/redux-devtools-core/src/app/containers/monitors/InspectorWrapper/SubTabs.tsx
@@ -11,6 +11,7 @@ import RawTab from './RawTab';
 import ChartTab from './ChartTab';
 import VisualDiffTab from './VisualDiffTab';
 import { StoreState } from '../../../reducers';
+import { Delta } from 'jsondiffpatch';
 
 type StateProps = ReturnType<typeof mapStateToProps>;
 type DispatchProps = ResolveThunks<typeof actionCreators>;
@@ -19,7 +20,7 @@ type Props = StateProps &
   TabComponentProps<unknown, Action<unknown>>;
 
 class SubTabs extends Component<Props> {
-  tabs?: Tab<unknown>[];
+  tabs?: (Tab<Props> | Tab<{ data: unknown }> | Tab<{ data?: Delta }>)[];
 
   constructor(props: Props) {
     super(props);
@@ -56,7 +57,7 @@ class SubTabs extends Component<Props> {
         {
           name: 'Raw',
           component: VisualDiffTab,
-          selector: this.selector,
+          selector: this.selector as () => { data?: Delta },
         },
       ];
       return;
@@ -88,7 +89,7 @@ class SubTabs extends Component<Props> {
 
     return (
       <Tabs
-        tabs={this.tabs!}
+        tabs={this.tabs! as any}
         selected={selected || 'Tree'}
         onClick={this.props.selectMonitorTab}
       />
diff --git a/packages/redux-devtools-core/src/app/containers/monitors/Slider.tsx b/packages/redux-devtools-core/src/app/containers/monitors/Slider.tsx
index 302ef95b..03a5fe4f 100644
--- a/packages/redux-devtools-core/src/app/containers/monitors/Slider.tsx
+++ b/packages/redux-devtools-core/src/app/containers/monitors/Slider.tsx
@@ -1,9 +1,10 @@
 import React, { Component } from 'react';
 import styled, { withTheme } from 'styled-components';
 import SliderMonitor from 'redux-devtools-slider-monitor';
-import { LiftedAction, LiftedState } from 'redux-devtools-instrument';
-import { Action, Dispatch } from 'redux';
+import { LiftedAction } from 'redux-devtools-instrument';
+import { Action } from 'redux';
 import { ThemeFromProvider } from 'devui';
+import { State } from '../../reducers/instances';
 
 const SliderWrapper = styled.div`
   border-color: ${(props) => props.theme.base02};
@@ -12,8 +13,8 @@ const SliderWrapper = styled.div`
 `;
 
 interface Props {
-  liftedState: LiftedState<unknown, Action<unknown>, unknown>;
-  dispatch: Dispatch<LiftedAction<unknown, Action<unknown>, unknown>>;
+  liftedState: State;
+  dispatch: (action: LiftedAction<unknown, Action<unknown>, unknown>) => void;
   theme: ThemeFromProvider;
 }
 
@@ -29,6 +30,8 @@ class Slider extends Component<Props> {
       <SliderWrapper>
         <SliderMonitor
           {...this.props.liftedState}
+          // eslint-disable-next-line @typescript-eslint/ban-ts-comment
+          // @ts-ignore
           dispatch={this.props.dispatch}
           theme={this.props.theme}
           hideResetButton
diff --git a/packages/redux-devtools-core/src/app/index.tsx b/packages/redux-devtools-core/src/app/index.tsx
index 836490b1..335e2c3e 100644
--- a/packages/redux-devtools-core/src/app/index.tsx
+++ b/packages/redux-devtools-core/src/app/index.tsx
@@ -1,6 +1,5 @@
 import 'devui/lib/presets';
 import React, { Component } from 'react';
-import PropTypes from 'prop-types';
 import { Provider } from 'react-redux';
 import { Store } from 'redux';
 import configureStore from './store/configureStore';
@@ -21,7 +20,8 @@ class Root extends Component<Props> {
       this.store = store;
       store.dispatch({
         type: CONNECT_REQUEST,
-        options: preloadedState!.connection || this.props.socketOptions,
+        options: (preloadedState!.connection ||
+          this.props.socketOptions) as ConnectionOptions,
       });
       this.forceUpdate();
     });
@@ -29,21 +29,13 @@ class Root extends Component<Props> {
 
   render() {
     if (!this.store) return null;
+    const AppAsAny = App as any;
     return (
       <Provider store={this.store}>
-        <App {...this.props} />
+        <AppAsAny {...this.props} />
       </Provider>
     );
   }
 }
 
-Root.propTypes = {
-  socketOptions: PropTypes.shape({
-    hostname: PropTypes.string,
-    port: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
-    autoReconnect: PropTypes.bool,
-    secure: PropTypes.bool,
-  }),
-};
-
 export default Root;
diff --git a/packages/redux-devtools-core/src/app/middlewares/api.ts b/packages/redux-devtools-core/src/app/middlewares/api.ts
index 204cd41a..08f91ef3 100644
--- a/packages/redux-devtools-core/src/app/middlewares/api.ts
+++ b/packages/redux-devtools-core/src/app/middlewares/api.ts
@@ -13,23 +13,36 @@ import {
   GET_REPORT_ERROR,
   GET_REPORT_SUCCESS,
 } from '../constants/actionTypes';
-import { showNotification, importState, StoreAction } from '../actions';
+import {
+  showNotification,
+  importState,
+  StoreAction,
+  EmitAction,
+  LiftedActionAction,
+  Request,
+  DispatchAction,
+} from '../actions';
 import { nonReduxDispatch } from '../utils/monitorActions';
 import { StoreState } from '../reducers';
 
 let socket: SCClientSocket;
 let store: MiddlewareAPI<Dispatch<StoreAction>, StoreState>;
 
-function emit({ message: type, id, instanceId, action, state }) {
+function emit({ message: type, id, instanceId, action, state }: EmitAction) {
   socket.emit(id ? 'sc-' + id : 'respond', { type, action, state, instanceId });
 }
 
-function startMonitoring(channel) {
+function startMonitoring(channel: string) {
   if (channel !== store.getState().socket.baseChannel) return;
   store.dispatch({ type: actions.EMIT, message: 'START' });
 }
 
-function dispatchRemoteAction({ message, action, state, toAll }) {
+function dispatchRemoteAction({
+  message,
+  action,
+  state,
+  toAll,
+}: LiftedActionAction) {
   const instances = store.getState().instances;
   const instanceId = getActiveInstance(instances);
   const id = !toAll && instances.options[instanceId].connectionId;
@@ -41,7 +54,7 @@ function dispatchRemoteAction({ message, action, state, toAll }) {
       store,
       message,
       instanceId,
-      action,
+      action as DispatchAction,
       state,
       instances
     ),
@@ -50,21 +63,32 @@ function dispatchRemoteAction({ message, action, state, toAll }) {
   });
 }
 
-interface DisconnectedAction {
+interface RequestBase {
+  id?: string;
+  instanceId?: string;
+}
+interface DisconnectedAction extends RequestBase {
   type: 'DISCONNECTED';
   id: string;
 }
-interface StartAction {
+interface StartAction extends RequestBase {
   type: 'START';
   id: string;
 }
-interface ErrorAction {
+interface ErrorAction extends RequestBase {
   type: 'ERROR';
   payload: string;
 }
-type Request = DisconnectedAction | StartAction | ErrorAction;
+interface RequestWithData extends RequestBase {
+  data: Request;
+}
+type MonitoringRequest =
+  | DisconnectedAction
+  | StartAction
+  | ErrorAction
+  | Request;
 
-function monitoring(request: Request) {
+function monitoring(request: MonitoringRequest) {
   if (request.type === 'DISCONNECTED') {
     store.dispatch({
       type: REMOVE_INSTANCE,
@@ -84,7 +108,9 @@ function monitoring(request: Request) {
 
   store.dispatch({
     type: UPDATE_STATE,
-    request: request.data ? { ...request.data, id: request.id } : request,
+    request: ((request as unknown) as RequestWithData).data
+      ? { ...((request as unknown) as RequestWithData).data, id: request.id }
+      : request,
   });
 
   const instances = store.getState().instances;
@@ -110,7 +136,7 @@ function subscribe(
   const channel = socket.subscribe(channelName);
   if (subscription === UPDATE_STATE) channel.watch(monitoring);
   else {
-    const watcher = (request) => {
+    const watcher = (request: Request) => {
       store.dispatch({ type: subscription, request });
     };
     channel.watch(watcher);
@@ -201,15 +227,19 @@ function login() {
   });
 }
 
-function getReport(reportId) {
-  socket.emit('getReport', reportId, (error, data) => {
-    if (error) {
-      store.dispatch({ type: GET_REPORT_ERROR, error });
-      return;
+function getReport(reportId: unknown) {
+  socket.emit(
+    'getReport',
+    reportId,
+    (error: Error, data: { payload: string }) => {
+      if (error) {
+        store.dispatch({ type: GET_REPORT_ERROR, error });
+        return;
+      }
+      store.dispatch({ type: GET_REPORT_SUCCESS, data });
+      store.dispatch(importState(data.payload));
     }
-    store.dispatch({ type: GET_REPORT_SUCCESS, data });
-    store.dispatch(importState(data.payload));
-  });
+  );
 }
 
 export default function api(
diff --git a/packages/redux-devtools-core/src/app/middlewares/exportState.ts b/packages/redux-devtools-core/src/app/middlewares/exportState.ts
index 9d0eab21..58cb9315 100644
--- a/packages/redux-devtools-core/src/app/middlewares/exportState.ts
+++ b/packages/redux-devtools-core/src/app/middlewares/exportState.ts
@@ -1,10 +1,13 @@
 import stringifyJSON from '../utils/stringifyJSON';
 import { UPDATE_STATE, LIFTED_ACTION, EXPORT } from '../constants/actionTypes';
 import { getActiveInstance } from '../reducers/instances';
+import { Dispatch, MiddlewareAPI } from 'redux';
+import { ExportRequest, StoreAction } from '../actions';
+import { StoreState } from '../reducers';
 
-let toExport;
+let toExport: string | undefined;
 
-function download(state) {
+function download(state: string) {
   const blob = new Blob([state], { type: 'octet/stream' });
   const href = window.URL.createObjectURL(blob);
   const a = document.createElement('a');
@@ -19,15 +22,17 @@ function download(state) {
   }, 0);
 }
 
-const exportState = (store) => (next) => (action) => {
+const exportState = (
+  store: MiddlewareAPI<Dispatch<StoreAction>, StoreState>
+) => (next: Dispatch<StoreAction>) => (action: StoreAction) => {
   const result = next(action);
 
   if (
     toExport &&
     action.type === UPDATE_STATE &&
-    action.request.type === 'EXPORT'
+    action.request!.type === 'EXPORT'
   ) {
-    const request = action.request;
+    const request = action.request!;
     const id = request.instanceId || request.id;
     if (id === toExport) {
       toExport = undefined;
@@ -35,7 +40,7 @@ const exportState = (store) => (next) => (action) => {
         JSON.stringify(
           {
             payload: request.payload,
-            preloadedState: request.committedState,
+            preloadedState: (request as ExportRequest).committedState,
           },
           null,
           '\t'
diff --git a/packages/redux-devtools-core/src/app/reducers/instances.ts b/packages/redux-devtools-core/src/app/reducers/instances.ts
index ba95f485..0e17daea 100644
--- a/packages/redux-devtools-core/src/app/reducers/instances.ts
+++ b/packages/redux-devtools-core/src/app/reducers/instances.ts
@@ -89,19 +89,20 @@ function updateState(
   id: string,
   serialize: boolean | undefined
 ) {
-  let payload = request.payload;
+  let payload: State = request.payload as State;
   const actionsById = request.actionsById;
   if (actionsById) {
     payload = {
+      // eslint-disable-next-line @typescript-eslint/ban-types
       ...payload,
       actionsById: parseJSON(actionsById, serialize),
       computedStates: parseJSON(request.computedStates, serialize),
-    };
+    } as State;
     if (request.type === 'STATE' && request.committedState) {
       payload.committedState = payload.computedStates[0].state;
     }
   } else {
-    payload = parseJSON(payload, serialize);
+    payload = parseJSON((payload as unknown) as string, serialize) as State;
   }
 
   let newState;
@@ -112,11 +113,11 @@ function updateState(
     case 'INIT':
       newState = recompute(state.default, payload, {
         action: { type: '@@INIT' },
-        timestamp: action.timestamp || Date.now(),
+        timestamp: (action as { timestamp?: unknown }).timestamp || Date.now(),
       });
       break;
     case 'ACTION': {
-      let isExcess = request.isExcess;
+      const isExcess = request.isExcess;
       const nextActionId = request.nextActionId || liftedState.nextActionId + 1;
       const maxAge = request.maxAge;
       if (Array.isArray(action)) {
@@ -125,7 +126,7 @@ function updateState(
         for (let i = 0; i < action.length; i++) {
           newState = recompute(
             newState,
-            request.batched ? payload : payload[i],
+            request.batched ? payload : ((payload as unknown) as State[])[i],
             action[i],
             newState.nextActionId + 1,
             maxAge,
diff --git a/packages/redux-devtools-core/src/app/reducers/monitor.ts b/packages/redux-devtools-core/src/app/reducers/monitor.ts
index ff9c68cf..8293d847 100644
--- a/packages/redux-devtools-core/src/app/reducers/monitor.ts
+++ b/packages/redux-devtools-core/src/app/reducers/monitor.ts
@@ -36,13 +36,12 @@ export function dispatchMonitorAction(
 ): MonitorState {
   return {
     ...state,
-    monitorState:
-      action.action.newMonitorState ||
+    monitorState: (action.action.newMonitorState ||
       action.monitorReducer(
         action.monitorProps,
         state.monitorState,
         action.action
-      ),
+      )) as MonitorStateMonitorState,
   };
 }
 
diff --git a/packages/redux-devtools-core/src/app/reducers/reports.ts b/packages/redux-devtools-core/src/app/reducers/reports.ts
index 37376bed..66d9f6f1 100644
--- a/packages/redux-devtools-core/src/app/reducers/reports.ts
+++ b/packages/redux-devtools-core/src/app/reducers/reports.ts
@@ -3,8 +3,12 @@ import {
 } from '../constants/actionTypes';
 import { StoreAction } from '../actions';
 
+export interface Data {
+  id: unknown;
+}
+
 export interface ReportsState {
-  data: unknown[];
+  data: Data[];
 }
 
 const initialState: ReportsState = {
diff --git a/packages/redux-devtools-core/src/app/reducers/socket.ts b/packages/redux-devtools-core/src/app/reducers/socket.ts
index b8cae6bf..ae8fc1b3 100644
--- a/packages/redux-devtools-core/src/app/reducers/socket.ts
+++ b/packages/redux-devtools-core/src/app/reducers/socket.ts
@@ -6,8 +6,10 @@ export interface SocketState {
   id: string | null;
   channels: string[];
   socketState: States;
-  authState: AuthStates;
+  authState: AuthStates | 'pending';
   error: Error | undefined;
+  baseChannel?: string;
+  authToken?: null;
 }
 
 const initialState: SocketState = {
@@ -18,7 +20,10 @@ const initialState: SocketState = {
   error: undefined,
 };
 
-export default function socket(state = initialState, action: StoreAction) {
+export default function socket(
+  state = initialState,
+  action: StoreAction
+): SocketState {
   switch (action.type) {
     case actions.CONNECT_REQUEST: {
       return {
diff --git a/packages/redux-devtools-core/src/app/store/configureStore.ts b/packages/redux-devtools-core/src/app/store/configureStore.ts
index c7ff4ad9..fc8be313 100644
--- a/packages/redux-devtools-core/src/app/store/configureStore.ts
+++ b/packages/redux-devtools-core/src/app/store/configureStore.ts
@@ -25,15 +25,23 @@ export default function configureStore(
     deserialize: (data: unknown) => data,
   } as unknown) as PersistorConfig;
 
+  // eslint-disable-next-line @typescript-eslint/no-floating-promises
   getStoredState<StoreState>(persistConfig, (err, restoredState) => {
     let composeEnhancers = compose;
     if (process.env.NODE_ENV !== 'production') {
-      if (window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__) {
-        composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__;
+      if (
+        ((window as unknown) as {
+          __REDUX_DEVTOOLS_EXTENSION_COMPOSE__?: typeof compose;
+        }).__REDUX_DEVTOOLS_EXTENSION_COMPOSE__
+      ) {
+        composeEnhancers = ((window as unknown) as {
+          __REDUX_DEVTOOLS_EXTENSION_COMPOSE__: typeof compose;
+        }).__REDUX_DEVTOOLS_EXTENSION_COMPOSE__;
       }
       if (module.hot) {
         // Enable Webpack hot module replacement for reducers
         module.hot.accept('../reducers', () => {
+          // eslint-disable-next-line @typescript-eslint/no-var-requires
           const nextReducer = require('../reducers'); // eslint-disable-line global-require
           store.replaceReducer(nextReducer);
         });
diff --git a/packages/redux-devtools-core/src/app/utils/commitExcessActions.ts b/packages/redux-devtools-core/src/app/utils/commitExcessActions.ts
index 76b5c15f..ff7f8fdb 100644
--- a/packages/redux-devtools-core/src/app/utils/commitExcessActions.ts
+++ b/packages/redux-devtools-core/src/app/utils/commitExcessActions.ts
@@ -1,7 +1,9 @@
 // Based on https://github.com/gaearon/redux-devtools/pull/241
 /* eslint-disable no-param-reassign */
 
-export default function commitExcessActions(liftedState, n = 1) {
+import { State } from '../reducers/instances';
+
+export default function commitExcessActions(liftedState: State, n = 1) {
   // Auto-commits n-number of excess actions.
   let excess = n;
   let idsToDelete = liftedState.stagedActionIds.slice(1, excess + 1);
diff --git a/packages/redux-devtools-core/src/app/utils/monitorActions.ts b/packages/redux-devtools-core/src/app/utils/monitorActions.ts
index 3ed3cc80..1e5fc604 100644
--- a/packages/redux-devtools-core/src/app/utils/monitorActions.ts
+++ b/packages/redux-devtools-core/src/app/utils/monitorActions.ts
@@ -2,7 +2,10 @@ import difference from 'lodash/difference';
 import omit from 'lodash/omit';
 import stringifyJSON from './stringifyJSON';
 import { SET_STATE } from '../constants/actionTypes';
-import { State } from '../reducers/instances';
+import { InstancesState, State } from '../reducers/instances';
+import { Dispatch, MiddlewareAPI } from 'redux';
+import { DispatchAction, StoreAction } from '../actions';
+import { StoreState } from '../reducers';
 
 export function sweep(state: State): State {
   return {
@@ -18,12 +21,12 @@ export function sweep(state: State): State {
 }
 
 export function nonReduxDispatch(
-  store,
-  message,
-  instanceId,
-  action,
-  initialState,
-  preInstances
+  store: MiddlewareAPI<Dispatch<StoreAction>, StoreState>,
+  message: string,
+  instanceId: string,
+  action: DispatchAction,
+  initialState: string | undefined,
+  preInstances: InstancesState
 ) {
   const instances = preInstances || store.getState().instances;
   const state = instances.states[instanceId];
diff --git a/packages/redux-devtools-core/src/app/utils/parseJSON.ts b/packages/redux-devtools-core/src/app/utils/parseJSON.ts
index c528eb60..3288fc20 100644
--- a/packages/redux-devtools-core/src/app/utils/parseJSON.ts
+++ b/packages/redux-devtools-core/src/app/utils/parseJSON.ts
@@ -1,17 +1,17 @@
 import jsan from 'jsan';
 import { DATA_TYPE_KEY, DATA_REF_KEY } from '../constants/dataTypes';
 
-export function reviver(key, value) {
+export function reviver(key: string, value: unknown) {
   if (
     typeof value === 'object' &&
     value !== null &&
     '__serializedType__' in value &&
-    typeof value.data === 'object'
+    typeof (value as any).data === 'object'
   ) {
-    const data = value.data;
-    data[DATA_TYPE_KEY] = value.__serializedType__;
+    const data = (value as any).data;
+    data[DATA_TYPE_KEY] = (value as any).__serializedType__;
     if ('__serializedRef__' in value)
-      data[DATA_REF_KEY] = value.__serializedRef__;
+      data[DATA_REF_KEY] = (value as any).__serializedRef__;
     /*
     if (Array.isArray(data)) {
       data.__serializedType__ = value.__serializedType__;
diff --git a/packages/redux-devtools-core/src/app/utils/stringifyJSON.ts b/packages/redux-devtools-core/src/app/utils/stringifyJSON.ts
index d3191612..3765284c 100644
--- a/packages/redux-devtools-core/src/app/utils/stringifyJSON.ts
+++ b/packages/redux-devtools-core/src/app/utils/stringifyJSON.ts
@@ -1,20 +1,21 @@
 import jsan from 'jsan';
 import { DATA_TYPE_KEY, DATA_REF_KEY } from '../constants/dataTypes';
 
-function replacer(key, value) {
+function replacer(key: string, value: unknown) {
   if (typeof value === 'object' && value !== null && DATA_TYPE_KEY in value) {
-    const __serializedType__ = value[DATA_TYPE_KEY];
+    const __serializedType__ = (value as any)[DATA_TYPE_KEY];
     const clone = { ...value };
-    delete clone[DATA_TYPE_KEY]; // eslint-disable-line no-param-reassign
+    delete (clone as any)[DATA_TYPE_KEY]; // eslint-disable-line no-param-reassign
     const r = { data: clone, __serializedType__ };
-    if (DATA_REF_KEY in value) r.__serializedRef__ = clone[DATA_REF_KEY];
+    if (DATA_REF_KEY in value)
+      (r as any).__serializedRef__ = (clone as any)[DATA_REF_KEY];
     return r;
   }
   return value;
 }
 
-export default function stringifyJSON(data, serialize) {
+export default function stringifyJSON(data: unknown, serialize: boolean) {
   return serialize
-    ? jsan.stringify(data, replacer, null, true)
+    ? jsan.stringify(data, replacer, (null as unknown) as undefined, true)
     : jsan.stringify(data);
 }
diff --git a/packages/redux-devtools-core/src/app/utils/updateState.ts b/packages/redux-devtools-core/src/app/utils/updateState.ts
index f802e272..c2b35bcf 100644
--- a/packages/redux-devtools-core/src/app/utils/updateState.ts
+++ b/packages/redux-devtools-core/src/app/utils/updateState.ts
@@ -1,10 +1,12 @@
 import commitExcessActions from './commitExcessActions';
 import { State } from '../reducers/instances';
+import { Action } from 'redux';
+import { PerformAction } from 'redux-devtools-instrument';
 
 export function recompute(
   previousLiftedState: State,
-  storeState,
-  action,
+  storeState: State,
+  action: Action<unknown>,
   nextActionId = 1,
   maxAge?: number,
   isExcess?: boolean
@@ -21,12 +23,14 @@ export function recompute(
   liftedState.stagedActionIds = [...liftedState.stagedActionIds, actionId];
   liftedState.actionsById = { ...liftedState.actionsById };
   if (action.type === 'PERFORM_ACTION') {
-    liftedState.actionsById[actionId] = action;
+    liftedState.actionsById[actionId] = action as PerformAction<
+      Action<unknown>
+    >;
   } else {
     liftedState.actionsById[actionId] = {
-      action: action.action || action,
-      timestamp: action.timestamp || Date.now(),
-      stack: action.stack,
+      action: (action as any).action || action,
+      timestamp: (action as any).timestamp || Date.now(),
+      stack: (action as any).stack,
       type: 'PERFORM_ACTION',
     };
   }
diff --git a/packages/redux-devtools-core/src/utils/catchErrors.ts b/packages/redux-devtools-core/src/utils/catchErrors.ts
index b6d42219..a04d2148 100644
--- a/packages/redux-devtools-core/src/utils/catchErrors.ts
+++ b/packages/redux-devtools-core/src/utils/catchErrors.ts
@@ -1,28 +1,53 @@
 const ERROR = '@@redux-devtools/ERROR';
 
-export default function catchErrors(sendError) {
+interface ErrorAction {
+  type: typeof ERROR;
+  message?: Event | string;
+  url?: string | undefined;
+  lineNo?: number | undefined;
+  columnNo?: number | undefined;
+  stack?: string;
+  error?: Error;
+  isFatal?: boolean;
+  sourceURL?: string;
+  line?: number;
+  column?: number;
+}
+
+export default function catchErrors(
+  sendError: (errorAction: ErrorAction) => void
+) {
   if (typeof window === 'object' && typeof window.onerror === 'object') {
     window.onerror = function (message, url, lineNo, columnNo, error) {
-      const errorAction = { type: ERROR, message, url, lineNo, columnNo };
+      const errorAction: ErrorAction = {
+        type: ERROR,
+        message,
+        url,
+        lineNo,
+        columnNo,
+      };
       if (error && error.stack) errorAction.stack = error.stack;
       sendError(errorAction);
       return false;
     };
-  } else if (typeof global !== 'undefined' && global.ErrorUtils) {
-    global.ErrorUtils.setGlobalHandler((error, isFatal) => {
-      sendError({ type: ERROR, error, isFatal });
-    });
+  } else if (typeof global !== 'undefined' && (global as any).ErrorUtils) {
+    (global as any).ErrorUtils.setGlobalHandler(
+      (error: Error, isFatal: boolean) => {
+        sendError({ type: ERROR, error, isFatal });
+      }
+    );
   }
 
   /* eslint-disable no-console */
   if (
     typeof console === 'object' &&
     typeof console.error === 'function' &&
-    !console.beforeRemotedev
+    !(console as any).beforeRemotedev
   ) {
-    console.beforeRemotedev = console.error.bind(console);
+    (console as any).beforeRemotedev = console.error.bind(console);
     console.error = function () {
-      let errorAction = { type: ERROR };
+      let errorAction: ErrorAction = { type: ERROR };
+      // eslint-disable-next-line prefer-rest-params
       const error = arguments[0];
       errorAction.message = error.message ? error.message : error;
       if (error.sourceURL) {
@@ -35,7 +60,8 @@ export default function catchErrors(sendError) {
       }
       if (error.stack) errorAction.stack = error.stack;
       sendError(errorAction);
-      console.beforeRemotedev.apply(null, arguments);
+      // eslint-disable-next-line prefer-rest-params
+      (console as any).beforeRemotedev.apply(null, arguments);
     };
   }
   /* eslint-enable no-console */