diff --git a/extension/src/app/reducers/panel/index.ts b/extension/src/app/reducers/panel/index.ts
index 1b72a59c..14e40425 100644
--- a/extension/src/app/reducers/panel/index.ts
+++ b/extension/src/app/reducers/panel/index.ts
@@ -1,23 +1,46 @@
 import { combineReducers, Reducer } from 'redux';
-import instances from '@redux-devtools/app/lib/reducers/instances';
-import monitor from '@redux-devtools/app/lib/reducers/monitor';
-import notification from '@redux-devtools/app/lib/reducers/notification';
-import reports from '@redux-devtools/app/lib/reducers/reports';
-import section from '@redux-devtools/app/lib/reducers/section';
-import theme from '@redux-devtools/app/lib/reducers/theme';
-import connection from '@redux-devtools/app/lib/reducers/connection';
-import { StoreState } from '@redux-devtools/app/lib/reducers';
+import instances, {
+  InstancesState,
+} from '@redux-devtools/app/lib/reducers/instances';
+import monitor, {
+  MonitorState,
+} from '@redux-devtools/app/lib/reducers/monitor';
+import notification, {
+  NotificationState,
+} from '@redux-devtools/app/lib/reducers/notification';
+import reports, {
+  ReportsState,
+} from '@redux-devtools/app/lib/reducers/reports';
+import section, {
+  SectionState,
+} from '@redux-devtools/app/lib/reducers/section';
+import theme, { ThemeState } from '@redux-devtools/app/lib/reducers/theme';
+import connection, {
+  ConnectionState,
+} from '@redux-devtools/app/lib/reducers/connection';
 import { StoreAction } from '@redux-devtools/app/lib/src/actions';
 
-const rootReducer: Reducer<StoreState, StoreAction> =
-  combineReducers<StoreState>({
-    instances,
-    monitor,
-    reports,
-    notification,
-    section,
-    theme,
-    connection,
-  });
+export interface StoreStateWithoutSocket {
+  readonly section: SectionState;
+  readonly theme: ThemeState;
+  readonly connection: ConnectionState;
+  readonly monitor: MonitorState;
+  readonly instances: InstancesState;
+  readonly reports: ReportsState;
+  readonly notification: NotificationState;
+}
+
+const rootReducer: Reducer<
+  StoreStateWithoutSocket,
+  StoreAction
+> = combineReducers<StoreStateWithoutSocket>({
+  instances,
+  monitor,
+  reports,
+  notification,
+  section,
+  theme,
+  connection,
+});
 
 export default rootReducer;
diff --git a/extension/src/browser/extension/background/contextMenus.ts b/extension/src/browser/extension/background/contextMenus.ts
index 070a1a3b..d8a30145 100644
--- a/extension/src/browser/extension/background/contextMenus.ts
+++ b/extension/src/browser/extension/background/contextMenus.ts
@@ -1,4 +1,4 @@
-import openDevToolsWindow from './openWindow';
+import openDevToolsWindow, { DevToolsPosition } from './openWindow';
 
 export function createMenu() {
   const menus = [
@@ -33,5 +33,5 @@ export function removeMenu() {
 }
 
 chrome.contextMenus.onClicked.addListener(({ menuItemId }) => {
-  openDevToolsWindow(menuItemId);
+  openDevToolsWindow(menuItemId as DevToolsPosition);
 });
diff --git a/extension/src/browser/extension/devpanel/index.tsx b/extension/src/browser/extension/devpanel/index.tsx
index cdf6fbd2..5b263417 100644
--- a/extension/src/browser/extension/devpanel/index.tsx
+++ b/extension/src/browser/extension/devpanel/index.tsx
@@ -11,6 +11,7 @@ import { Action, PreloadedState, Store } from 'redux';
 import { StoreState } from '@redux-devtools/app/lib/reducers';
 import { StoreAction } from '@redux-devtools/app/lib/src/actions';
 import { PanelMessage } from '../../../app/middlewares/api';
+import { StoreStateWithoutSocket } from '../../../app/reducers/panel';
 
 const position = location.hash;
 const messageStyle: CSSProperties = {
@@ -20,7 +21,9 @@ const messageStyle: CSSProperties = {
 };
 
 let rendered: boolean | undefined;
-let store: Store<StoreState, StoreAction> | undefined;
+let store:
+  | Store<StoreStateWithoutSocket, StoreAction>
+  | undefined;
 let bgConnection: chrome.runtime.Port;
 let naTimeout: NodeJS.Timeout;
 let preloadedState: PreloadedState<StoreState>;
diff --git a/extension/webpack/base.config.js b/extension/webpack/base.config.js
index f6ce54a5..0fde60d6 100644
--- a/extension/webpack/base.config.js
+++ b/extension/webpack/base.config.js
@@ -1,6 +1,7 @@
 import path from 'path';
 import webpack from 'webpack';
 import CopyPlugin from 'copy-webpack-plugin';
+import ForkTsCheckerWebpackPlugin from 'fork-ts-checker-webpack-plugin';
 
 const extpath = path.join(__dirname, '../src/browser/extension/');
 const mock = `${extpath}chromeAPIMock`;
@@ -31,7 +32,15 @@ const baseConfig = (params) => ({
   },
   plugins: [
     new webpack.DefinePlugin(params.globals),
-    ...(params.plugins ? params.plugins : []),
+    ...(params.plugins
+      ? params.plugins
+      : [
+          new ForkTsCheckerWebpackPlugin({
+            typescript: {
+              configFile: 'tsconfig.json',
+            },
+          }),
+        ]),
   ].concat(
     params.copy
       ? new CopyPlugin({
diff --git a/packages/redux-devtools-app/.eslintrc.js b/packages/redux-devtools-app/.eslintrc.js
index ce28cd35..d5331241 100644
--- a/packages/redux-devtools-app/.eslintrc.js
+++ b/packages/redux-devtools-app/.eslintrc.js
@@ -9,6 +9,14 @@ module.exports = {
         project: ['./tsconfig.json'],
       },
     },
+    {
+      files: ['demo/*.ts', 'demo/*.tsx'],
+      extends: '../../eslintrc.ts.react.base.json',
+      parserOptions: {
+        tsconfigRootDir: __dirname,
+        project: ['./tsconfig.demo.json'],
+      },
+    },
     {
       files: ['test/*.ts', 'test/*.tsx'],
       extends: '../../eslintrc.ts.react.jest.base.json',
diff --git a/packages/redux-devtools-app/tsconfig.demo.json b/packages/redux-devtools-app/tsconfig.demo.json
new file mode 100644
index 00000000..fe7c960f
--- /dev/null
+++ b/packages/redux-devtools-app/tsconfig.demo.json
@@ -0,0 +1,4 @@
+{
+  "extends": "../../tsconfig.react.base.json",
+  "include": ["demo", "src"]
+}
diff --git a/packages/redux-devtools-app/tsconfig.json b/packages/redux-devtools-app/tsconfig.json
index b742078e..7b7d1492 100644
--- a/packages/redux-devtools-app/tsconfig.json
+++ b/packages/redux-devtools-app/tsconfig.json
@@ -3,5 +3,5 @@
   "compilerOptions": {
     "outDir": "lib"
   },
-  "include": ["demo", "src"]
+  "include": ["src"]
 }
diff --git a/packages/redux-devtools-app/webpack.config.ts b/packages/redux-devtools-app/webpack.config.ts
index c419bcc5..7831a152 100644
--- a/packages/redux-devtools-app/webpack.config.ts
+++ b/packages/redux-devtools-app/webpack.config.ts
@@ -65,7 +65,7 @@ module.exports = (env: { development?: boolean; platform?: string } = {}) => ({
     }),
     new ForkTsCheckerWebpackPlugin({
       typescript: {
-        configFile: 'tsconfig.json',
+        configFile: 'tsconfig.demo.json',
       },
     }),
   ],
diff --git a/packages/redux-devtools-utils/package.json b/packages/redux-devtools-utils/package.json
index b613a458..93df3ad8 100644
--- a/packages/redux-devtools-utils/package.json
+++ b/packages/redux-devtools-utils/package.json
@@ -34,6 +34,7 @@
   "dependencies": {
     "@redux-devtools/core": "^3.9.0",
     "@redux-devtools/serialize": "^0.3.0",
+    "@types/get-params": "^0.1.0",
     "get-params": "^0.1.2",
     "immutable": "^4.0.0-rc.14",
     "jsan": "^3.1.13",
diff --git a/packages/redux-devtools-utils/src/get-params.ts b/packages/redux-devtools-utils/src/get-params.ts
deleted file mode 100644
index 417ec500..00000000
--- a/packages/redux-devtools-utils/src/get-params.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-declare module 'get-params' {
-  function getParams(func: (...args: any[]) => unknown): string[];
-  export default getParams;
-}
diff --git a/yarn.lock b/yarn.lock
index 6a6365db..f14cbc3d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5254,6 +5254,7 @@ __metadata:
   dependencies:
     "@redux-devtools/core": ^3.9.0
     "@redux-devtools/serialize": ^0.3.0
+    "@types/get-params": ^0.1.0
     get-params: ^0.1.2
     immutable: ^4.0.0-rc.14
     jsan: ^3.1.13
@@ -6894,6 +6895,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/get-params@npm:^0.1.0":
+  version: 0.1.0
+  resolution: "@types/get-params@npm:0.1.0"
+  checksum: be378a08606c975c05faa1a64e73bfec3e98a924bda282109e4a6fe222cffab087ee47277aadf3dbe77e999b4bb5153553e073f008d6b9518862dc924c85ccff
+  languageName: node
+  linkType: hard
+
 "@types/glob-base@npm:^0.3.0":
   version: 0.3.0
   resolution: "@types/glob-base@npm:0.3.0"