diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 0c18db24c..ce7b3b236 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -7,6 +7,9 @@ on:
 permissions:
   contents: read
 
+env:
+  COMPOSER_ROOT_VERSION: dev-main
+
 jobs:
   tests:
     name: "CI (PHP ${{ matrix.php-version }}, ${{ matrix.dependencies }} deps)"
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 90568ba4a..f5dcbc594 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -7,6 +7,9 @@ on:
 permissions:
   contents: read
 
+env:
+  COMPOSER_ROOT_VERSION: dev-main
+
 jobs:
   tests:
     name: "PHPStan"