diff --git a/.github/workflows/run.tests.yml b/.github/workflows/run.tests.yml
index 841a727..d5f76f4 100644
--- a/.github/workflows/run.tests.yml
+++ b/.github/workflows/run.tests.yml
@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [7.4]
+        php: [8.1]
         dependency-version: [prefer-stable]
 
     name: P${{ matrix.php }}