diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 1e8ff85..b3c99fd 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -42,6 +42,7 @@ jobs:
             fail-fast: false
             matrix:
                 php:
+                    - '7.3'
                     - '7.4'
                     - '8.0'
                 composer_options: [ "" ]
diff --git a/composer.json b/composer.json
index 9330feb..5e44c2c 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         "bdunogier/ezplatform-graphql-bundle": "self.version"
     },
     "require": {
-        "php": "^7.4 || ^8.0",
+        "php": "^7.3 || ^8.0",
         "ext-dom": "*",
         "ezsystems/ezplatform-kernel": "^1.3@dev",
         "ezsystems/ezplatform-admin-ui": "^2.0@dev",