diff --git a/.github/workflows/moodle-ci.yml b/.github/workflows/moodle-ci.yml
index 19ef45d..a098dd7 100644
--- a/.github/workflows/moodle-ci.yml
+++ b/.github/workflows/moodle-ci.yml
@@ -135,7 +135,7 @@ jobs:
             moodle-branch: 'MOODLE_401_STABLE'
           - php: '8.3'
             moodle-branch: 'MOODLE_401_STABLE'
-          - php: 8.3'
+          - php: '8.3'
             moodle-branch: 'MOODLE_403_STABLE'
         include:
           - php: '7.4'