diff --git a/.eslintrc.js b/.eslintrc.js
index dbf43124daaf..8117c216f349 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -97,7 +97,7 @@ module.exports = {
     // TODO re-enable some these as errors
     // context: https://github.com/facebook/docusaurus/pull/2949
     '@typescript-eslint/ban-types': WARNING,
-    'import/no-extraneous-dependencies': WARNING,
+    'import/no-extraneous-dependencies': ERROR,
     'no-useless-escape': WARNING,
     'prefer-template': WARNING,
     'no-param-reassign': WARNING,
diff --git a/packages/docusaurus-plugin-content-blog/package.json b/packages/docusaurus-plugin-content-blog/package.json
index 3cbb69f88394..cc6a19a3948a 100644
--- a/packages/docusaurus-plugin-content-blog/package.json
+++ b/packages/docusaurus-plugin-content-blog/package.json
@@ -29,7 +29,8 @@
     "loader-utils": "^1.2.3",
     "lodash.kebabcase": "^4.1.1",
     "reading-time": "^1.2.0",
-    "remark-admonitions": "^1.2.1"
+    "remark-admonitions": "^1.2.1",
+    "webpack": "^4.41.2"
   },
   "peerDependencies": {
     "react": "^16.8.4",
diff --git a/packages/docusaurus-plugin-content-pages/package.json b/packages/docusaurus-plugin-content-pages/package.json
index 7868fa42bd2f..20b392fcfb80 100644
--- a/packages/docusaurus-plugin-content-pages/package.json
+++ b/packages/docusaurus-plugin-content-pages/package.json
@@ -25,7 +25,8 @@
     "loader-utils": "^1.2.3",
     "minimatch": "^3.0.4",
     "remark-admonitions": "^1.2.1",
-    "slash": "^3.0.0"
+    "slash": "^3.0.0",
+    "webpack": "^4.41.2"
   },
   "peerDependencies": {
     "@docusaurus/core": "^2.0.0",
diff --git a/packages/docusaurus-plugin-ideal-image/package.json b/packages/docusaurus-plugin-ideal-image/package.json
index 5380f1cead8a..1a709faa7de9 100644
--- a/packages/docusaurus-plugin-ideal-image/package.json
+++ b/packages/docusaurus-plugin-ideal-image/package.json
@@ -12,15 +12,16 @@
   },
   "license": "MIT",
   "devDependencies": {
-    "@docusaurus/types": "^2.0.0-alpha.61",
     "fs-extra": "^9.0.0"
   },
   "dependencies": {
     "@docusaurus/lqip-loader": "^2.0.0-alpha.61",
+    "@docusaurus/types": "^2.0.0-alpha.61",
     "@endiliey/react-ideal-image": "^0.0.11",
     "@endiliey/responsive-loader": "^1.3.2",
     "react-waypoint": "^9.0.2",
-    "sharp": "^0.25.2"
+    "sharp": "^0.25.2",
+    "webpack": "^4.41.2"
   },
   "peerDependencies": {
     "@docusaurus/core": "^2.0.0",
diff --git a/packages/docusaurus-plugin-pwa/package.json b/packages/docusaurus-plugin-pwa/package.json
index 7491375790a9..1596e5e3952b 100644
--- a/packages/docusaurus-plugin-pwa/package.json
+++ b/packages/docusaurus-plugin-pwa/package.json
@@ -13,6 +13,7 @@
     "@babel/preset-env": "^7.9.0",
     "@hapi/joi": "^17.1.1",
     "babel-loader": "^8.1.0",
+    "clsx": "^1.1.1",
     "core-js": "^2.6.5",
     "terser-webpack-plugin": "^2.3.5",
     "webpack": "^4.41.2",
diff --git a/packages/docusaurus-theme-bootstrap/package.json b/packages/docusaurus-theme-bootstrap/package.json
index f2fb2da39e87..71179dd613ee 100644
--- a/packages/docusaurus-theme-bootstrap/package.json
+++ b/packages/docusaurus-theme-bootstrap/package.json
@@ -11,6 +11,7 @@
     "@mdx-js/react": "^1.5.8",
     "bootstrap": "^4.4.1",
     "classnames": "^2.2.6",
+    "clsx": "^1.1.1",
     "prism-react-renderer": "^1.1.0",
     "reactstrap": "^8.4.1"
   },
diff --git a/packages/docusaurus-theme-search-algolia/package.json b/packages/docusaurus-theme-search-algolia/package.json
index 9d57f83c51ba..2b1ea93964bd 100644
--- a/packages/docusaurus-theme-search-algolia/package.json
+++ b/packages/docusaurus-theme-search-algolia/package.json
@@ -9,15 +9,16 @@
   "license": "MIT",
   "dependencies": {
     "@docsearch/react": "^1.0.0-alpha.27",
+    "@docusaurus/utils": "^2.0.0-alpha.61",
     "@hapi/joi": "^17.1.1",
     "algoliasearch": "^4.0.0",
     "algoliasearch-helper": "^3.1.1",
     "clsx": "^1.1.1",
-    "eta": "^1.1.1"
+    "eta": "^1.1.1",
+    "lodash": "^4.17.19"
   },
   "peerDependencies": {
     "@docusaurus/core": "^2.0.0",
-    "@docusaurus/utils": "2.0.0-alpha.60",
     "react": "^16.8.4",
     "react-dom": "^16.8.4"
   },
diff --git a/packages/docusaurus-types/src/index.d.ts b/packages/docusaurus-types/src/index.d.ts
index 7c93cbc25be0..73f741fcdcd3 100644
--- a/packages/docusaurus-types/src/index.d.ts
+++ b/packages/docusaurus-types/src/index.d.ts
@@ -5,6 +5,8 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+// ESLint doesn't understand types dependencies in d.ts
+// eslint-disable-next-line import/no-extraneous-dependencies
 import {Loader, Configuration} from 'webpack';
 import {Command} from 'commander';
 import {ParsedUrlQueryInput} from 'querystring';