diff --git a/packages/redux-devtools-inspector-monitor-test-tab/demo/package.json b/packages/redux-devtools-inspector-monitor-test-tab/demo/package.json
index 094e01a9..e81e9b7f 100644
--- a/packages/redux-devtools-inspector-monitor-test-tab/demo/package.json
+++ b/packages/redux-devtools-inspector-monitor-test-tab/demo/package.json
@@ -42,6 +42,7 @@
     "@types/react-router": "^5.1.17",
     "@types/redux-logger": "^3.0.9",
     "@types/styled-components": "^5.1.19",
+    "@types/webpack-env": "^1.16.3",
     "@typescript-eslint/eslint-plugin": "^5.8.1",
     "@typescript-eslint/parser": "^5.8.1",
     "babel-loader": "^8.2.3",
diff --git a/packages/redux-devtools-inspector-monitor-test-tab/demo/tsconfig.json b/packages/redux-devtools-inspector-monitor-test-tab/demo/tsconfig.json
index 420884ce..13a7994d 100644
--- a/packages/redux-devtools-inspector-monitor-test-tab/demo/tsconfig.json
+++ b/packages/redux-devtools-inspector-monitor-test-tab/demo/tsconfig.json
@@ -1,7 +1,8 @@
 {
   "extends": "../../../tsconfig.react.base.json",
   "compilerOptions": {
-    "resolveJsonModule": true
+    "resolveJsonModule": true,
+    "types": ["webpack-env"]
   },
   "include": ["../src", "src"]
 }
diff --git a/yarn.lock b/yarn.lock
index 9e6d6c89..d7735bad 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -28145,6 +28145,7 @@ __metadata:
     "@types/react-router": ^5.1.17
     "@types/redux-logger": ^3.0.9
     "@types/styled-components": ^5.1.19
+    "@types/webpack-env": ^1.16.3
     "@typescript-eslint/eslint-plugin": ^5.8.1
     "@typescript-eslint/parser": ^5.8.1
     babel-loader: ^8.2.3