diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a03b9cfe..5bacd6af 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   testsuite:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-24.04
     strategy:
       fail-fast: false
       matrix:
@@ -15,7 +15,7 @@ jobs:
             composer-opts: '--prefer-lowest'
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - name: Setup PHP
       uses: shivammathur/setup-php@v2
@@ -48,10 +48,10 @@ jobs:
 
   cs-stan:
       name: Coding Standard & Static Analysis
-      runs-on: ubuntu-18.04
+      runs-on: ubuntu-24.04
 
       steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2