diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 573e9130..d8e0273b 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -25,7 +25,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ubuntu-20.04, ubuntu-18.04, ubuntu-16.04, windows-latest, macos-latest]
-        php-versions: ['5.3', '5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
+        php-versions: ['5.3', '5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1']
     env:
       extensions: xml, opcache, xdebug, pcov
       key: cache-v3