diff --git a/packages/d3-state-visualizer/src/charts/tree/tree.ts b/packages/d3-state-visualizer/src/charts/tree/tree.ts
index 00a548f0..a3238c66 100644
--- a/packages/d3-state-visualizer/src/charts/tree/tree.ts
+++ b/packages/d3-state-visualizer/src/charts/tree/tree.ts
@@ -388,12 +388,12 @@ export default function (
           fill: style.text.colors.default,
           cursor: 'pointer',
         })
-        .on('mouseover', function mouseover(this: any) {
+        .on('mouseover', function mouseover(this: EventTarget) {
           d3.select(this).style({
             fill: style.text.colors.hover,
           });
         })
-        .on('mouseout', function mouseout(this: any) {
+        .on('mouseout', function mouseout(this: EventTarget) {
           d3.select(this).style({
             fill: style.text.colors.default,
           });
@@ -401,7 +401,7 @@ export default function (
 
       if (!tooltipOptions.disabled) {
         nodeEnter.call(
-          d3tooltip(d3, 'tooltip', { ...tooltipOptions, root })
+          d3tooltip<NodeWithId>(d3, 'tooltip', { ...tooltipOptions, root })
             .text((d, i) => getTooltipString(d, i, tooltipOptions))
             .style(tooltipOptions.style)
         );
diff --git a/packages/d3tooltip/src/index.ts b/packages/d3tooltip/src/index.ts
index 2f093242..0077693f 100644
--- a/packages/d3tooltip/src/index.ts
+++ b/packages/d3tooltip/src/index.ts
@@ -20,11 +20,40 @@ const defaultOptions: Options<unknown> = {
   root: undefined,
 };
 
+interface Tip<Datum> {
+  (selection: Selection<Datum>): void;
+  attr: (
+    this: this,
+    d:
+      | string
+      | {
+          [key: string]:
+            | Primitive
+            | ((datum: Datum, index: number, outerIndex: number) => Primitive);
+        }
+  ) => this;
+  style: (
+    this: this,
+    d:
+      | string
+      | {
+          [key: string]:
+            | Primitive
+            | ((datum: Datum, index: number, outerIndex: number) => Primitive);
+        }
+      | undefined
+  ) => this;
+  text: (
+    this: this,
+    d: string | ((datum: Datum, index?: number, outerIndex?: number) => string)
+  ) => this;
+}
+
 export default function tooltip<Datum>(
   d3: typeof d3Package,
   className = 'tooltip',
   options: Partial<Options<Datum>> = {}
-) {
+): Tip<Datum> {
   const { left, top, offset, root } = {
     ...defaultOptions,
     ...options,
@@ -74,6 +103,7 @@ export default function tooltip<Datum>(
   }
 
   tip.attr = function setAttr(
+    this: typeof tip,
     d:
       | string
       | {
@@ -96,6 +126,7 @@ export default function tooltip<Datum>(
   };
 
   tip.style = function setStyle(
+    this: typeof tip,
     d:
       | string
       | {
@@ -103,6 +134,7 @@ export default function tooltip<Datum>(
             | Primitive
             | ((datum: Datum, index: number, outerIndex: number) => Primitive);
         }
+      | undefined
   ) {
     if (is(Object, d)) {
       styles = {
@@ -118,6 +150,7 @@ export default function tooltip<Datum>(
   };
 
   tip.text = function setText(
+    this: typeof tip,
     d: string | ((datum: Datum, index?: number, outerIndex?: number) => string)
   ) {
     text = functor(d);
diff --git a/packages/react-base16-styling/src/index.ts b/packages/react-base16-styling/src/index.ts
index 45f87a98..23a9652b 100644
--- a/packages/react-base16-styling/src/index.ts
+++ b/packages/react-base16-styling/src/index.ts
@@ -63,7 +63,7 @@ const mergeStyling = (
             style: defaultStyling as CSS.Properties<string | number>,
           });
         case 'function':
-          return (styling: Styling, ...args: any[]) =>
+          return (styling: Styling, ...args: unknown[]) =>
             merger({
               className: customStyling as string,
             })((defaultStyling as StylingValueFunction)(styling, ...args));
@@ -82,7 +82,7 @@ const mergeStyling = (
             ...(customStyling as CSS.Properties<string | number>),
           };
         case 'function':
-          return (styling: Styling, ...args: any[]) =>
+          return (styling: Styling, ...args: unknown[]) =>
             merger({
               style: customStyling as CSS.Properties<string | number>,
             })((defaultStyling as StylingValueFunction)(styling, ...args));
@@ -143,7 +143,7 @@ const mergeStylings = (
 const getStylingByKeys = (
   mergedStyling: StylingConfig,
   keys: (string | false | undefined) | (string | false | undefined)[],
-  ...args: any[]
+  ...args: unknown[]
 ): Styling => {
   if (keys === null) {
     return mergedStyling as unknown as Styling;
diff --git a/packages/react-base16-styling/src/types.ts b/packages/react-base16-styling/src/types.ts
index 58839f8e..0c221ca1 100644
--- a/packages/react-base16-styling/src/types.ts
+++ b/packages/react-base16-styling/src/types.ts
@@ -8,7 +8,7 @@ export interface Styling {
 
 export type StylingValueFunction = (
   styling: Styling,
-  ...rest: any[]
+  ...rest: unknown[]
 ) => Partial<Styling>;
 
 export type StylingValue =
diff --git a/packages/react-json-tree/src/getCollectionEntries.ts b/packages/react-json-tree/src/getCollectionEntries.ts
index efca5f7f..85c5403b 100644
--- a/packages/react-json-tree/src/getCollectionEntries.ts
+++ b/packages/react-json-tree/src/getCollectionEntries.ts
@@ -1,6 +1,7 @@
 function getLength(type: string, collection: any) {
   if (type === 'Object') {
-    return Object.keys(collection).length;
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    return Object.keys(collection as {}).length;
   } else if (type === 'Array') {
     return (collection as unknown[]).length;
   }
diff --git a/packages/redux-devtools-app/src/containers/monitors/InspectorWrapper/VisualDiffTab.tsx b/packages/redux-devtools-app/src/containers/monitors/InspectorWrapper/VisualDiffTab.tsx
index d029317e..c02d38f4 100644
--- a/packages/redux-devtools-app/src/containers/monitors/InspectorWrapper/VisualDiffTab.tsx
+++ b/packages/redux-devtools-app/src/containers/monitors/InspectorWrapper/VisualDiffTab.tsx
@@ -1,7 +1,8 @@
 import React, { Component } from 'react';
 import { Delta, formatters } from 'jsondiffpatch';
-import styled from 'styled-components';
+import styled, { ThemedStyledProps } from 'styled-components';
 import { effects } from '@redux-devtools/ui';
+import { Theme } from '@redux-devtools/ui/lib/themes/default';
 
 export const StyledContainer = styled.div`
   .jsondiffpatch-delta {
@@ -18,7 +19,8 @@ export const StyledContainer = styled.div`
     padding: 2px 3px;
     border-radius: 3px;
     position: relative;
-    color: ${(props) => props.theme.base07};
+    ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+    color: ${(props: ThemedStyledProps<{}, Theme>) => props.theme.base07};
     display: inline-block;
   }
 
@@ -42,20 +44,25 @@ export const StyledContainer = styled.div`
   .jsondiffpatch-modified .jsondiffpatch-right-value:before {
     vertical-align: top;
     padding: 2px;
-    color: ${(props) => props.theme.base0E};
+    ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+    color: ${(props: ThemedStyledProps<{}, Theme>) => props.theme.base0E};
     content: ' => ';
   }
 
   .jsondiffpatch-added .jsondiffpatch-value pre,
   .jsondiffpatch-modified .jsondiffpatch-right-value pre,
   .jsondiffpatch-textdiff-added {
-    background: ${(props) => effects.color(props.theme.base0B, 'alpha', 0.2)};
+    ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+    background: ${(props: ThemedStyledProps<{}, Theme>) =>
+      effects.color(props.theme.base0B, 'alpha', 0.2)};
   }
 
   .jsondiffpatch-deleted pre,
   .jsondiffpatch-modified .jsondiffpatch-left-value pre,
   .jsondiffpatch-textdiff-deleted {
-    background: ${(props) => effects.color(props.theme.base08, 'alpha', 0.2)};
+    ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+    background: ${(props: ThemedStyledProps<{}, Theme>) =>
+      effects.color(props.theme.base08, 'alpha', 0.2)};
     text-decoration: line-through;
   }
 
@@ -122,12 +129,14 @@ export const StyledContainer = styled.div`
     padding: 2px 0;
     padding-right: 5px;
     vertical-align: top;
-    color: ${(props) => props.theme.base0D};
+    ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+    color: ${(props: ThemedStyledProps<{}, Theme>) => props.theme.base0D};
   }
 
   .jsondiffpatch-property-name:after {
     content: ': ';
-    color: ${(props) => props.theme.base07};
+    ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+    color: ${(props: ThemedStyledProps<{}, Theme>) => props.theme.base07};
   }
 
   .jsondiffpatch-child-node-type-array > .jsondiffpatch-property-name:after {
@@ -163,7 +172,8 @@ export const StyledContainer = styled.div`
   }
 
   .jsondiffpatch-value pre:after {
-    color: ${(props) => props.theme.base07};
+    ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+    color: ${(props: ThemedStyledProps<{}, Theme>) => props.theme.base07};
     content: ',';
   }
 
@@ -186,7 +196,8 @@ export const StyledContainer = styled.div`
 
   .jsondiffpatch-moved .jsondiffpatch-moved-destination {
     display: inline-block;
-    background: ${(props) => props.theme.base0A};
+    ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+    background: ${(props: ThemedStyledProps<{}, Theme>) => props.theme.base0A};
   }
 
   .jsondiffpatch-moved .jsondiffpatch-moved-destination:before {
diff --git a/packages/redux-devtools-app/src/reducers/instances.ts b/packages/redux-devtools-app/src/reducers/instances.ts
index 0a079ff9..e516c549 100644
--- a/packages/redux-devtools-app/src/reducers/instances.ts
+++ b/packages/redux-devtools-app/src/reducers/instances.ts
@@ -129,7 +129,7 @@ function updateState(
           newState = recompute(
             newState,
             request.batched ? payload : (payload as unknown as State[])[i],
-            action[i],
+            action[i] as PerformAction<Action<unknown>>,
             newState.nextActionId + 1,
             maxAge,
             isExcess
diff --git a/packages/redux-devtools-app/src/store/configureStore.ts b/packages/redux-devtools-app/src/store/configureStore.ts
index a6d24986..8d87a096 100644
--- a/packages/redux-devtools-app/src/store/configureStore.ts
+++ b/packages/redux-devtools-app/src/store/configureStore.ts
@@ -40,7 +40,7 @@ export default function configureStore(
       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);
+        store.replaceReducer(nextReducer as Reducer<StoreState, StoreAction>);
       });
     }
   }
diff --git a/packages/redux-devtools-cli/src/bin/injectServer.ts b/packages/redux-devtools-cli/src/bin/injectServer.ts
index 033655e7..91fa1c6c 100644
--- a/packages/redux-devtools-cli/src/bin/injectServer.ts
+++ b/packages/redux-devtools-cli/src/bin/injectServer.ts
@@ -21,7 +21,7 @@ const serverFlags: { [moduleName: string]: { [version: string]: string } } = {
   },
 };
 
-function getModuleVersion(modulePath: string) {
+function getModuleVersion(modulePath: string): string {
   return JSON.parse(
     fs.readFileSync(path.join(modulePath, 'package.json'), 'utf-8')
   ).version;
@@ -41,14 +41,14 @@ function getServerFlag(moduleName: string, version: string): string {
 
 export const dir = 'local-cli/server';
 export const file = 'server.js';
-export const fullPath = path.join(exports.dir, exports.file);
+export const fullPath = path.join(dir, file);
 
 export function inject(
   modulePath: string,
   options: Options,
   moduleName: string
 ) {
-  const filePath = path.join(modulePath, exports.fullPath);
+  const filePath = path.join(modulePath, fullPath);
   if (!fs.existsSync(filePath)) return false;
 
   const serverFlag = getServerFlag(moduleName, getModuleVersion(modulePath));
@@ -85,7 +85,7 @@ export function revert(
   options: Options,
   moduleName: string
 ) {
-  const filePath = path.join(modulePath, exports.fullPath);
+  const filePath = path.join(modulePath, fullPath);
   if (!fs.existsSync(filePath)) return false;
 
   const serverFlag = getServerFlag(moduleName, getModuleVersion(modulePath));
diff --git a/packages/redux-devtools-cli/src/bin/openApp.ts b/packages/redux-devtools-cli/src/bin/openApp.ts
index 84436bd9..99a9cd39 100644
--- a/packages/redux-devtools-cli/src/bin/openApp.ts
+++ b/packages/redux-devtools-cli/src/bin/openApp.ts
@@ -8,7 +8,7 @@ export default async function openApp(app: true | string, options: Options) {
     try {
       const port = options.port ? `--port=${options.port}` : '';
       // eslint-disable-next-line @typescript-eslint/no-var-requires
-      spawn.sync(require('electron'), [
+      spawn.sync(require('electron') as string, [
         path.join(__dirname, '..', '..', 'app'),
         port,
       ]);
diff --git a/packages/redux-devtools-cli/src/bin/redux-devtools.ts b/packages/redux-devtools-cli/src/bin/redux-devtools.ts
index d63802e9..049d245b 100644
--- a/packages/redux-devtools-cli/src/bin/redux-devtools.ts
+++ b/packages/redux-devtools-cli/src/bin/redux-devtools.ts
@@ -17,8 +17,8 @@ function readFile(filePath: string) {
 }
 
 if (argv.protocol === 'https') {
-  argv.key = argv.key ? readFile(argv.key) : null;
-  argv.cert = argv.cert ? readFile(argv.cert) : null;
+  argv.key = argv.key ? readFile(argv.key as string) : null;
+  argv.cert = argv.cert ? readFile(argv.cert as string) : null;
 }
 
 function log(pass: boolean, msg: string) {
@@ -76,13 +76,13 @@ function injectRN(type: string, msg: string) {
 
 if (argv.revert) {
   injectRN(
-    argv.revert,
+    argv.revert as string,
     'Revert injection of ReduxDevTools server from React Native local server'
   );
 }
 if (argv.injectserver) {
   injectRN(
-    argv.injectserver,
+    argv.injectserver as string,
     'Inject ReduxDevTools server into React Native local server'
   );
 }
@@ -91,7 +91,7 @@ if (argv.injectserver) {
 server(argv).then(function (r) {
   if (argv.open && argv.open !== 'false') {
     r.on('ready', async function () {
-      await openApp(argv.open, options);
+      await openApp(argv.open as string, options);
     });
   }
 });
diff --git a/packages/redux-devtools-cli/src/db/connector.ts b/packages/redux-devtools-cli/src/db/connector.ts
index e162ef1e..c00c3ab1 100644
--- a/packages/redux-devtools-cli/src/db/connector.ts
+++ b/packages/redux-devtools-cli/src/db/connector.ts
@@ -1,11 +1,11 @@
 import path from 'path';
-import knexModule from 'knex';
+import knexModule, { Config } from 'knex';
 import { SCServer } from 'socketcluster-server';
 
 export default function connector(options: SCServer.SCServerOptions) {
-  const dbOptions = options.dbOptions;
+  const dbOptions = options.dbOptions as Config;
   dbOptions.useNullAsDefault = true;
-  if (!dbOptions.migrate) {
+  if (!(dbOptions as any).migrate) {
     return knexModule(dbOptions);
   }
 
diff --git a/packages/redux-devtools-cli/src/options.ts b/packages/redux-devtools-cli/src/options.ts
index fed19ca5..336d166b 100644
--- a/packages/redux-devtools-cli/src/options.ts
+++ b/packages/redux-devtools-cli/src/options.ts
@@ -31,7 +31,7 @@ export interface Options {
 export default function getOptions(argv: { [arg: string]: any }): Options {
   let dbOptions = argv.dbOptions;
   if (typeof dbOptions === 'string') {
-    dbOptions = require(path.resolve(process.cwd(), argv.dbOptions));
+    dbOptions = require(path.resolve(process.cwd(), argv.dbOptions as string));
   } else if (typeof dbOptions === 'undefined') {
     dbOptions = require('../defaultDbOptions.json');
   }
diff --git a/packages/redux-devtools-cli/src/routes.ts b/packages/redux-devtools-cli/src/routes.ts
index 58f3749b..2a477dd5 100644
--- a/packages/redux-devtools-cli/src/routes.ts
+++ b/packages/redux-devtools-cli/src/routes.ts
@@ -1,11 +1,12 @@
 import path from 'path';
 import express from 'express';
 import morgan from 'morgan';
+import * as http from 'http';
 import bodyParser from 'body-parser';
 import cors from 'cors';
 import { SCServer } from 'socketcluster-server';
 import graphqlMiddleware from './middleware/graphql';
-import { ReportBaseFields, Store } from './store';
+import { AddData, ReportBaseFields, Store } from './store';
 
 const app = express.Router();
 
@@ -27,7 +28,15 @@ function routes(
 
   if (logHTTPRequests) {
     if (typeof logHTTPRequests === 'object')
-      app.use(morgan('combined', logHTTPRequests));
+      app.use(
+        morgan(
+          'combined',
+          logHTTPRequests as morgan.Options<
+            http.IncomingMessage,
+            http.ServerResponse
+          >
+        )
+      );
     else app.use(morgan('combined'));
   }
 
@@ -55,7 +64,7 @@ function routes(
     switch (req.body.op) {
       case 'get':
         store
-          .get(req.body.id)
+          .get(req.body.id as string)
           .then(function (r) {
             res.send(r || {});
           })
@@ -66,7 +75,7 @@ function routes(
         break;
       case 'list':
         store
-          .list(req.body.query, req.body.fields)
+          .list(req.body.query, req.body.fields as string[])
           .then(function (r) {
             res.send(r);
           })
@@ -77,7 +86,7 @@ function routes(
         break;
       default:
         store
-          .add(req.body)
+          .add(req.body as AddData)
           .then(function (r) {
             res.send({
               id: (r as ReportBaseFields).id,
diff --git a/packages/redux-devtools-cli/src/store.ts b/packages/redux-devtools-cli/src/store.ts
index 01f3f61f..b4776000 100644
--- a/packages/redux-devtools-cli/src/store.ts
+++ b/packages/redux-devtools-cli/src/store.ts
@@ -62,7 +62,7 @@ function get(id: string): Promise<Report | { error: string }> {
   return knex(reports).where('id', id).first();
 }
 
-interface AddData {
+export interface AddData {
   type: ReportType | null;
   title: string | null;
   description: string | null;
diff --git a/packages/redux-devtools-cli/src/worker.ts b/packages/redux-devtools-cli/src/worker.ts
index 4c1e3fa3..b6597e09 100644
--- a/packages/redux-devtools-cli/src/worker.ts
+++ b/packages/redux-devtools-cli/src/worker.ts
@@ -60,7 +60,7 @@ class Worker extends SCWorker {
         });
         respond(null, channelToWatch);
       });
-      socket.on('getReport', function (id, respond) {
+      socket.on('getReport', function (id: string, respond) {
         store
           .get(id)
           .then(function (data) {
diff --git a/packages/redux-devtools-inspector-monitor-trace-tab/src/openFile.ts b/packages/redux-devtools-inspector-monitor-trace-tab/src/openFile.ts
index a542fa40..9f8fbca0 100644
--- a/packages/redux-devtools-inspector-monitor-trace-tab/src/openFile.ts
+++ b/packages/redux-devtools-inspector-monitor-trace-tab/src/openFile.ts
@@ -118,7 +118,7 @@ export default function openFile(
         typeof editor === 'string' &&
         /^\w{1,30}$/.test(editor)
       ) {
-        openInEditor(editor.toLowerCase(), projectPath, stackFrame);
+        openInEditor(editor.toLowerCase(), projectPath as string, stackFrame);
       } else {
         if (
           chrome.devtools &&
diff --git a/packages/redux-devtools-inspector-monitor-trace-tab/src/react-error-overlay/utils/getSourceMap.ts b/packages/redux-devtools-inspector-monitor-trace-tab/src/react-error-overlay/utils/getSourceMap.ts
index d461b8ea..c198733a 100644
--- a/packages/redux-devtools-inspector-monitor-trace-tab/src/react-error-overlay/utils/getSourceMap.ts
+++ b/packages/redux-devtools-inspector-monitor-trace-tab/src/react-error-overlay/utils/getSourceMap.ts
@@ -12,7 +12,7 @@ import { RawSourceMap, SourceMapConsumer } from 'source-map';
  *
  * This exposes methods which will be indifferent to changes made in <code>{@link https://github.com/mozilla/source-map source-map}</code>.
  */
-class SourceMap {
+export class SourceMap {
   __source_map: SourceMapConsumer;
 
   constructor(sourceMap: SourceMapConsumer) {
@@ -74,7 +74,7 @@ class SourceMap {
   }
 }
 
-function extractSourceMapUrl(
+export function extractSourceMapUrl(
   fileUri: string,
   fileContents: string
 ): Promise<string> {
@@ -98,7 +98,7 @@ function extractSourceMapUrl(
  * @param {string} fileUri The URI of the source file.
  * @param {string} fileContents The contents of the source file.
  */
-async function getSourceMap(
+export async function getSourceMap(
   //function getSourceMap(
   fileUri: string,
   fileContents: string
@@ -120,7 +120,7 @@ async function getSourceMap(
     const index = fileUri.lastIndexOf('/');
     const url = fileUri.substring(0, index + 1) + sm;
     const obj = await fetch(url).then((res) => res.json());
-    return new SourceMap(new SourceMapConsumer(obj));
+    return new SourceMap(new SourceMapConsumer(obj as RawSourceMap));
   }
 
   /*
@@ -153,5 +153,4 @@ async function getSourceMap(
       */
 }
 
-export { extractSourceMapUrl, getSourceMap };
 export default getSourceMap;
diff --git a/packages/redux-devtools-inspector-monitor-trace-tab/src/react-error-overlay/utils/mapper.ts b/packages/redux-devtools-inspector-monitor-trace-tab/src/react-error-overlay/utils/mapper.ts
index 5977c742..43d35f15 100644
--- a/packages/redux-devtools-inspector-monitor-trace-tab/src/react-error-overlay/utils/mapper.ts
+++ b/packages/redux-devtools-inspector-monitor-trace-tab/src/react-error-overlay/utils/mapper.ts
@@ -6,7 +6,7 @@
  */
 
 import StackFrame from './stack-frame';
-import { getSourceMap } from './getSourceMap';
+import { getSourceMap, SourceMap } from './getSourceMap';
 import { getLinesAround } from './getLinesAround';
 
 /**
@@ -18,7 +18,12 @@ async function map(
   frames: StackFrame[],
   contextLines = 3
 ): Promise<StackFrame[]> {
-  const cache: any = {};
+  const cache: {
+    [fileName: string]: {
+      readonly fileSource: string;
+      readonly map: SourceMap;
+    };
+  } = {};
   const files: string[] = [];
   frames.forEach((frame) => {
     const { fileName } = frame;
@@ -45,7 +50,7 @@ async function map(
     }
     const { source, line, column } = map.getOriginalPosition(
       lineNumber,
-      columnNumber
+      columnNumber!
     );
     const originalSource = source == null ? [] : map.getSource(source) || [];
     return new StackFrame(
@@ -58,7 +63,7 @@ async function map(
       source,
       line,
       column,
-      getLinesAround(line, contextLines, originalSource)
+      getLinesAround(line!, contextLines, originalSource)
     );
   });
 }
diff --git a/packages/redux-devtools-inspector-monitor/src/tabs/getItemString.tsx b/packages/redux-devtools-inspector-monitor/src/tabs/getItemString.tsx
index 515643ea..65eb1b32 100644
--- a/packages/redux-devtools-inspector-monitor/src/tabs/getItemString.tsx
+++ b/packages/redux-devtools-inspector-monitor/src/tabs/getItemString.tsx
@@ -23,7 +23,8 @@ function getShortTypeString(val: any, diff: boolean | undefined) {
   } else if (val === undefined) {
     return 'undef';
   } else if (typeof val === 'object') {
-    return Object.keys(val).length > 0 ? '{…}' : '{}';
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    return Object.keys(val as {}).length > 0 ? '{…}' : '{}';
   } else if (typeof val === 'function') {
     return 'fn';
   } else if (typeof val === 'string') {
@@ -42,7 +43,8 @@ function getText(
   isDiff: boolean | undefined
 ) {
   if (type === 'Object') {
-    const keys = Object.keys(data);
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    const keys = Object.keys(data as {});
     if (!isWideLayout) return keys.length ? '{…}' : '{}';
 
     const str = keys
diff --git a/packages/redux-devtools-rtk-query-monitor/demo/src/features/posts/PostDetail.tsx b/packages/redux-devtools-rtk-query-monitor/demo/src/features/posts/PostDetail.tsx
index f3b0fd58..35ed2ced 100644
--- a/packages/redux-devtools-rtk-query-monitor/demo/src/features/posts/PostDetail.tsx
+++ b/packages/redux-devtools-rtk-query-monitor/demo/src/features/posts/PostDetail.tsx
@@ -72,7 +72,7 @@ const PostJsonDetail = ({ id }: { id: string }) => {
 };
 
 export const PostDetail = () => {
-  const { id } = useParams<{ id: any }>();
+  const { id } = useParams<{ id: string }>();
   const history = useHistory();
 
   const toast = useToast();
diff --git a/packages/redux-devtools-rtk-query-monitor/demo/src/services/posts.ts b/packages/redux-devtools-rtk-query-monitor/demo/src/services/posts.ts
index 2e099065..4f83e232 100644
--- a/packages/redux-devtools-rtk-query-monitor/demo/src/services/posts.ts
+++ b/packages/redux-devtools-rtk-query-monitor/demo/src/services/posts.ts
@@ -42,7 +42,7 @@ export const postsApi = createApi({
       }),
       invalidatesTags: (result, error, { id }) => [{ type: 'Post', id }],
     }),
-    deletePost: build.mutation<{ success: boolean; id: number }, number>({
+    deletePost: build.mutation<{ success: boolean; id: number }, string>({
       query(id) {
         return {
           url: `posts/${id}`,
diff --git a/packages/redux-devtools-rtk-query-monitor/src/styles/tree.tsx b/packages/redux-devtools-rtk-query-monitor/src/styles/tree.tsx
index 1dfe3469..fbf37ecc 100644
--- a/packages/redux-devtools-rtk-query-monitor/src/styles/tree.tsx
+++ b/packages/redux-devtools-rtk-query-monitor/src/styles/tree.tsx
@@ -44,7 +44,8 @@ function getText(
   isDiff: boolean | undefined
 ) {
   if (type === 'Object') {
-    const keys = Object.keys(data);
+    // eslint-disable-next-line @typescript-eslint/ban-types
+    const keys = Object.keys(data as {});
     if (!previewContent) return keys.length ? '{…}' : '{}';
 
     const str = keys
diff --git a/packages/redux-devtools-serialize/src/helpers/index.ts b/packages/redux-devtools-serialize/src/helpers/index.ts
index 99076e3b..f1412596 100644
--- a/packages/redux-devtools-serialize/src/helpers/index.ts
+++ b/packages/redux-devtools-serialize/src/helpers/index.ts
@@ -35,13 +35,26 @@ export function extract(data: unknown, type: string): SerializedData {
   };
 }
 
+export function refer(data: unknown, type: string): SerializedData;
 export function refer<K extends string>(
   data: { [key in K]: () => unknown },
   type: string,
-  transformMethod: K | false,
+  transformMethod?: K | false,
+  refs?: (new (data: any) => unknown)[] | null
+): SerializedData;
+export function refer<K extends string>(
+  data: any,
+  type: string,
+  transformMethod?: 'toString' | false,
+  refs?: (new (data: any) => unknown)[] | null
+): SerializedData;
+export function refer<K extends string>(
+  data: { [key in K]: () => unknown } | unknown,
+  type: string,
+  transformMethod?: K | false,
   refs?: (new (data: any) => unknown)[] | null
 ): SerializedData {
-  const r = mark(data, type, transformMethod);
+  const r = mark(data as { [key in K]: () => unknown }, type, transformMethod);
   if (!refs) return r;
   for (let i = 0; i < refs.length; i++) {
     const ref = refs[i];
diff --git a/packages/redux-devtools-serialize/test/helpers.spec.ts b/packages/redux-devtools-serialize/test/helpers.spec.ts
index 62af59a3..b830242d 100644
--- a/packages/redux-devtools-serialize/test/helpers.spec.ts
+++ b/packages/redux-devtools-serialize/test/helpers.spec.ts
@@ -16,7 +16,9 @@ describe('Helpers', function () {
     const TestClass = function (data: unknown) {
       return data;
     };
-    const testInstance = new (TestClass as any)({ testData: 'test' });
+    const testInstance = new (TestClass as any)({
+      testData: 'test',
+    }) as unknown;
     expect(
       refer(testInstance, 'testType', false, [TestClass as any])
     ).toMatchSnapshot();
diff --git a/packages/redux-devtools-ui/src/Container/styles/index.ts b/packages/redux-devtools-ui/src/Container/styles/index.ts
index d8be6617..65c548d0 100644
--- a/packages/redux-devtools-ui/src/Container/styles/index.ts
+++ b/packages/redux-devtools-ui/src/Container/styles/index.ts
@@ -1,5 +1,6 @@
-import styled from 'styled-components';
+import styled, { ThemedStyledProps } from 'styled-components';
 import color from '../../utils/color';
+import { Theme } from '../../themes/default';
 
 export const MainContainerWrapper = styled.div`
   display: flex;
@@ -7,7 +8,9 @@ export const MainContainerWrapper = styled.div`
   width: 100%;
   flex-flow: column nowrap;
   overflow: auto;
-  background-color: ${(props) => color(props.theme.base00, 'lighten', 0.03)};
+  ${/* eslint-disable-next-line @typescript-eslint/ban-types */ ''}
+  background-color: ${(props: ThemedStyledProps<{}, Theme>) =>
+    color(props.theme.base00, 'lighten', 0.03)};
   color: ${(props) => props.theme.base07};
   font-size: 12px;
 
diff --git a/packages/redux-devtools-ui/src/utils/createStyledComponent.ts b/packages/redux-devtools-ui/src/utils/createStyledComponent.ts
index fc77eac9..d92d6574 100644
--- a/packages/redux-devtools-ui/src/utils/createStyledComponent.ts
+++ b/packages/redux-devtools-ui/src/utils/createStyledComponent.ts
@@ -65,15 +65,15 @@ export default function createStyledComponent<
 ): StyledComponent<C, Theme | Base16Theme, O> {
   return (styled as ThemedStyledInterface<Theme>)((component || 'div') as C)`
     ${(props: ThemedStyledProps<StyledComponentPropsWithRef<C> & O, Theme>) =>
-      isThemeFromProvider(props.theme)
-        ? getStyle(styles, props.theme.type)
+      isThemeFromProvider(props.theme as Theme | Base16Theme)
+        ? getStyle(styles, props.theme.type as string)
         : // used outside of container (theme provider)
           getStyle(
             styles,
             'default'
           )({
             ...props,
-            theme: getDefaultTheme(props.theme),
+            theme: getDefaultTheme(props.theme as Base16Theme),
           })}
   ` as StyledComponent<C, Theme | Base16Theme, O>;
 }
diff --git a/packages/redux-devtools-utils/src/index.ts b/packages/redux-devtools-utils/src/index.ts
index b4af6b8a..9e1f00ee 100644
--- a/packages/redux-devtools-utils/src/index.ts
+++ b/packages/redux-devtools-utils/src/index.ts
@@ -71,14 +71,15 @@ export function getActionsArray(actionCreators: {
   return flatTree(actionCreators);
 }
 
-// eslint-disable-next-line @typescript-eslint/no-implied-eval
-const interpretArg = (arg: string) => new Function('return ' + arg)();
+const interpretArg = (arg: string): unknown =>
+  // eslint-disable-next-line @typescript-eslint/no-implied-eval
+  new Function('return ' + arg)();
 
-function evalArgs(inArgs: string[], restArgs: string) {
+function evalArgs(inArgs: string[], restArgs: string): unknown[] {
   const args = inArgs.map(interpretArg);
   if (!restArgs) return args;
   const rest = interpretArg(restArgs);
-  if (Array.isArray(rest)) return args.concat(...rest);
+  if (Array.isArray(rest)) return args.concat(...(rest as unknown[]));
   throw new Error('rest must be an array');
 }
 
diff --git a/packages/redux-devtools/examples/counter/src/store/configureStore.dev.ts b/packages/redux-devtools/examples/counter/src/store/configureStore.dev.ts
index 15d7cfc2..5e1d12d3 100644
--- a/packages/redux-devtools/examples/counter/src/store/configureStore.dev.ts
+++ b/packages/redux-devtools/examples/counter/src/store/configureStore.dev.ts
@@ -1,4 +1,10 @@
-import { createStore, applyMiddleware, compose, PreloadedState } from 'redux';
+import {
+  createStore,
+  applyMiddleware,
+  compose,
+  PreloadedState,
+  Reducer,
+} from 'redux';
 import { persistState } from '@redux-devtools/core';
 import thunk from 'redux-thunk';
 import rootReducer, { CounterState } from '../reducers';
@@ -23,7 +29,7 @@ export default function configureStore(
   if (module.hot) {
     module.hot.accept('../reducers', () =>
       // eslint-disable-next-line @typescript-eslint/no-var-requires
-      store.replaceReducer(require('../reducers').default)
+      store.replaceReducer(require('../reducers').default as Reducer)
     );
   }
 
diff --git a/packages/redux-devtools/src/persistState.ts b/packages/redux-devtools/src/persistState.ts
index dd0c1fd2..2a73babc 100644
--- a/packages/redux-devtools/src/persistState.ts
+++ b/packages/redux-devtools/src/persistState.ts
@@ -36,9 +36,9 @@ export default function persistState<
   }
 
   return (next) =>
-    <S, A extends Action<unknown>>(
-      reducer: Reducer<S, A>,
-      initialState?: PreloadedState<S>
+    <S2, A2 extends Action<unknown>>(
+      reducer: Reducer<S2, A2>,
+      initialState?: PreloadedState<S2>
     ) => {
       const key = `redux-dev-session-${sessionId}`;
 
@@ -46,7 +46,9 @@ export default function persistState<
       try {
         const json = localStorage.getItem(key);
         if (json) {
-          finalInitialState = deserialize(JSON.parse(json)) || initialState;
+          finalInitialState =
+            deserialize(JSON.parse(json) as LiftedState<S, A, MonitorState>) ||
+            initialState;
           next(reducer, initialState);
         }
       } catch (e) {
@@ -60,12 +62,12 @@ export default function persistState<
 
       const store = next(
         reducer,
-        finalInitialState as PreloadedState<S> | undefined
+        finalInitialState as PreloadedState<S2> | undefined
       );
 
       return {
         ...store,
-        dispatch<T extends A>(action: T) {
+        dispatch<T extends A2>(action: T) {
           store.dispatch(action);
 
           try {