diff --git a/action.yml b/action.yml
index 903ffd9..6621501 100644
--- a/action.yml
+++ b/action.yml
@@ -5,7 +5,7 @@ inputs:
   file:
     description: 'file to hash for cache key'
     required: false
-    default: 'composer.lock'
+    default: '**/composer.lock'
 
 runs:
   using: "composite"
@@ -24,7 +24,7 @@ runs:
     - uses: actions/cache@v4
       with:
         path: ${{ steps.composer-cache.outputs.dir }}
-        key: ${{ runner.os }}-composer-${{ hashFiles('**/' + inputs.file) }}
+        key: ${{ runner.os }}-composer-${{ hashFiles(inputs.file) }}
         restore-keys: |
           ${{ runner.os }}-composer-