diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5f8fea2..6195d12 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,7 +3,7 @@ name: build
 on: [push, pull_request]
 
 env:
-    DEFAULT_COMPOSER_FLAGS: "--prefer-dist --no-interaction --no-progress --optimize-autoloader --ansi"
+    DEFAULT_COMPOSER_FLAGS: "--prefer-dist --no-interaction --no-progress --optimize-autoloader --ansi --ignore-platform-req=php"
 
 jobs:
     phpunit: