diff --git a/.github/workflows/brakeman.yml b/.github/workflows/brakeman.yml
index 4f5304b..e567da2 100644
--- a/.github/workflows/brakeman.yml
+++ b/.github/workflows/brakeman.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Install package dependencies
       run: >
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 247901f..6b5043c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -20,7 +20,7 @@ jobs:
 
     services:
       postgres:
-        image: postgres:13
+        image: postgres:16
         env:
           POSTGRES_DB: redmine
           POSTGRES_USER: postgres
@@ -54,20 +54,20 @@ jobs:
         if: matrix.db == 'mysql'
 
       - name: Checkout Redmine
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: redmine/redmine
           ref: ${{ matrix.redmine }}
           path: redmine
 
       - name: Checkout additionals
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           repository: AlphaNodes/additionals
           path: redmine/plugins/additionals
 
       - name: Checkout redmine_hedgedoc
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           path: redmine/plugins/redmine_hedgedoc
 
@@ -92,8 +92,6 @@ jobs:
       - name: Prepare Redmine source
         working-directory: redmine
         run: |
-          sed -i '/rubocop/d' Gemfile
-          rm -f .rubocop*
           cp plugins/redmine_hedgedoc/test/support/database-${{ matrix.db }}.yml config/database.yml
           cp plugins/redmine_hedgedoc/test/support/configuration.yml config/configuration.yml