diff --git a/action.yml b/action.yml
index 619bb6e..be1be9d 100644
--- a/action.yml
+++ b/action.yml
@@ -27,7 +27,7 @@ inputs:
     required: false
    
   useComposer:
-    description: "Use Laravel Pint version from project composer lock file."
+    description: "Use Laravel Pint version from project composer lock file. Lock file must be preset to use this flag."
     required: false
 runs:
   using: 'docker'