diff --git a/.github/workflows/diagnostics.yml b/.github/workflows/diagnostics.yml
index 44a5c18..abf2cc6 100644
--- a/.github/workflows/diagnostics.yml
+++ b/.github/workflows/diagnostics.yml
@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Pull source
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Setup PHP with PECL extension
         uses: shivammathur/setup-php@v2