diff --git a/.github/workflows/phar.yml b/.github/workflows/phar.yml
index a967dac72..b487f6b56 100644
--- a/.github/workflows/phar.yml
+++ b/.github/workflows/phar.yml
@@ -25,7 +25,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
           restore-keys: ${{ runner.os }}-composer-
 
       - name: Install dependencies