diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9f433483..27df72dc 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,7 +19,7 @@ jobs:
         strategy:
             matrix:
                 node-version: ['lts/*']
-                php-versions: ['7.4', '8.0', '8.1']
+                php-versions: ['7.3', '7.4', '8.0', '8.1']
                 # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
         steps: