diff --git a/.github/workflows/backend-tests.yml b/.github/workflows/backend-tests.yml
index b80f570..0d47a43 100644
--- a/.github/workflows/backend-tests.yml
+++ b/.github/workflows/backend-tests.yml
@@ -45,12 +45,14 @@ jobs:
       -
         uses: actions/setup-node@v3
         with:
-          node-version: 12
+          node-version: 20
           cache: 'npm'
           cache-dependency-path: |
             src/package-lock.json
             src/bin/doc/package-lock.json
             node_modules/${{ steps.plugin_name.outputs.plugin_name }}/package-lock.json
+      - run: npm install npm@6.14.18 -g
+        name: Install legacy npm for correct dependency resolution
       -
         name: Install plugin dependencies
         run: |
diff --git a/.github/workflows/frontend-tests.yml b/.github/workflows/frontend-tests.yml
index 8491ec3..69a7e6a 100644
--- a/.github/workflows/frontend-tests.yml
+++ b/.github/workflows/frontend-tests.yml
@@ -34,11 +34,13 @@ jobs:
       -
         uses: actions/setup-node@v3
         with:
-          node-version: 12
+          node-version: 20
           cache: 'npm'
           cache-dependency-path: |
             src/package-lock.json
             src/bin/doc/package-lock.json
+      - run: npm install npm@6.14.18 -g
+        name: Install legacy npm for correct dependency resolution
       -
         name: Check out the plugin
         uses: actions/checkout@v3
diff --git a/.github/workflows/npmpublish.yml b/.github/workflows/npmpublish.yml
index d9dfb3f..ae88186 100644
--- a/.github/workflows/npmpublish.yml
+++ b/.github/workflows/npmpublish.yml
@@ -42,12 +42,14 @@ jobs:
       -
         uses: actions/setup-node@v3
         with:
-          node-version: 12
+          node-version: 20
           cache: 'npm'
           cache-dependency-path: |
             node_modules/ep_etherpad-lite/package-lock.json
             node_modules/ep_etherpad-lite/bin/doc/package-lock.json
             package-lock.json
+      - run: npm install npm@6.14.18 -g
+        name: Install legacy npm for correct dependency resolution
       # All of ep_etherpad-lite's devDependencies are installed because the
       # plugin might do `require('ep_etherpad-lite/node_modules/${devDep}')`.
       # Eventually it would be nice to create an ESLint plugin that prohibits
@@ -83,9 +85,11 @@ jobs:
       -
         uses: actions/setup-node@v3
         with:
-          node-version: 12
+          node-version: 20
           registry-url: https://registry.npmjs.org/
           cache: 'npm'
+      - run: npm install npm@6.14.18 -g
+        name: Install legacy npm for correct dependency resolution
       -
         name: Bump version (patch)
         run: |
diff --git a/.gitignore b/.gitignore
index 6e1b2f8..a684bdc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 .cache.json
 .ep_initialized
 node_modules
-node_modules/
\ No newline at end of file
+node_modules/
+.idea