diff --git a/.github/workflows/main-ci.yml b/.github/workflows/main-ci.yml
index 5d21097f..11e7c0a7 100644
--- a/.github/workflows/main-ci.yml
+++ b/.github/workflows/main-ci.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php_version: [72, 73]
+        php_version: ["7.2", "7.3"]
         service: [php-fpm, php-worker]
     steps:
     - uses: actions/checkout@v2