diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9dc9b4d..1a239f1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -52,7 +52,7 @@ jobs:
         with:
           php-version: ${{ matrix.php }}
           ini-values: max_input_vars=5000
-          tools: composer:v2.6
+          tools: composer:v2.5
           coverage: pcov
 
       - name: npm cache