diff --git a/.azure-pipelines/publish-nightly.yml b/.azure-pipelines/publish-nightly.yml
index 081ab373..2517d717 100644
--- a/.azure-pipelines/publish-nightly.yml
+++ b/.azure-pipelines/publish-nightly.yml
@@ -57,7 +57,7 @@ extends:
           - script: npm ci
             displayName: Install NPM dependencies
 
-          - script: yarn ts-node ./scripts/ci/monaco-editor-core-prepare nightly
+          - script: npm run ts-node ./scripts/ci/monaco-editor-core-prepare nightly
             env:
               VSCODE_REF: ${{ parameters.vscodeRef }}
               PRERELEASE_VERSION: ${{ parameters.prereleaseVersion }}
@@ -78,7 +78,7 @@ extends:
           - script: npm ci
             displayName: Install NPM dependencies
 
-          - script: yarn ts-node ./scripts/ci/monaco-editor-prepare nightly
+          - script: npm run ts-node ./scripts/ci/monaco-editor-prepare nightly
             env:
               VSCODE_REF: ${{ parameters.vscodeRef }}
               PRERELEASE_VERSION: ${{ parameters.prereleaseVersion }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index db226144..aed40b1e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,12 +65,12 @@ jobs:
 
       - name: Install website node modules
         working-directory: website
-        run: yarn install --frozen-lockfile
+        run: npm ci
 
       - name: Build website
         working-directory: website
-        run: yarn run build
+        run: npm run build
 
       - name: Test website
         working-directory: website
-        run: yarn test
+        run: npm run test
diff --git a/.github/workflows/website.yml b/.github/workflows/website.yml
index 1ff6c69a..32e9898d 100644
--- a/.github/workflows/website.yml
+++ b/.github/workflows/website.yml
@@ -28,7 +28,7 @@ jobs:
         uses: actions/checkout@v3
       - uses: actions/setup-node@1f8c6b94b26d0feae1e387ca63ccbdc44d27b561 # pin@v2
         with:
-          node-version: 16
+          node-version: 20
       - name: Cache node modules
         id: cacheNodeModules
         uses: actions/cache@v2
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 68998ab7..2a71e8ae 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -35,7 +35,7 @@ This can be done directly from the VS Code repository and does not involve the m
 
 - Clone the [VS Code repository](https://github.com/microsoft/vscode): `git clone https://github.com/microsoft/vscode`
 - Open the repository in VS Code: `code vscode`
-- Run `yarn install`
+- Run `npm install`
 - Select and run the launch configuration "Monaco Editor Playground" (this might take a while, as it compiles the sources):
 
   ![](./docs/launch%20config.png)
diff --git a/scripts/ci/monaco-editor-core.sh b/scripts/ci/monaco-editor-core.sh
index 52725a15..56f4c2f9 100755
--- a/scripts/ci/monaco-editor-core.sh
+++ b/scripts/ci/monaco-editor-core.sh
@@ -3,18 +3,18 @@ set -e
 
 # cwd must be the vscode repository.
 
-yarn --frozen-lockfile --network-timeout 180000
-yarn playwright-install
-yarn gulp hygiene
-yarn valid-layers-check
-yarn --cwd build compile
-yarn eslint
-yarn monaco-compile-check
-yarn --max_old_space_size=4095 compile
+npm ci
+npm run playwright-install
+npm run gulp hygiene
+npm run valid-layers-check
+cd build && npm run compile && cd -
+npm run eslint
+npm run monaco-compile-check
+npm run compile
 
-yarn test-browser --browser chromium
+npm run test-browser --browser chromium
 
-yarn gulp editor-distro
+npm run gulp editor-distro
 mkdir typings-test
 
 cd typings-test
@@ -25,10 +25,10 @@ echo "import '../out-monaco-editor-core';" > a.ts
 cd ..
 
 cd test/monaco
-yarn run esm-check
-yarn run bundle-webpack
-yarn run compile
-yarn test
+npm run esm-check
+npm run bundle-webpack
+npm run compile
+npm test
 cd ../..
 
 # npm package is now in dependencies/vscode/out-monaco-editor-core, ready to be published