diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ff970da..5486e7f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,6 +1,7 @@
 name: CI
 on:
   push:
+    branches: [master]
   pull_request:
   schedule:
     # Run every on Friday to ensure everything works as expected.
@@ -12,13 +13,12 @@ jobs:
       image: zammad/zammad-ci:latest
     services:
       postgresql:
-        image: postgres:14
+        image: postgres:17
         env:
           POSTGRES_USER: zammad
           POSTGRES_PASSWORD: zammad
       redis:
-        # Use Redis 5 which is shipped in Debian 10.
-        image: redis:5
+        image: redis:7
     env:
       ZAMMAD_PHP_API_CLIENT_UNIT_TESTS_URL: "http://localhost:3000"
       ZAMMAD_PHP_API_CLIENT_UNIT_TESTS_USERNAME: "admin@example.com"
@@ -26,7 +26,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: ['7.4', '7.3', '7.2', '8.0', '8.1', '8.2']
+        php: ['7.4', '7.3', '7.2', '8.0', '8.1', '8.2', '8.3', '8.4']
     name: PHP ${{ matrix.php }}
     steps:
       - uses: actions/checkout@v2