diff --git a/action.yml b/action.yml
index 63aacb7..a0d155c 100644
--- a/action.yml
+++ b/action.yml
@@ -38,7 +38,7 @@ inputs:
   prettier_plugins:
     description: Install Prettier plugins, i.e. `@prettier/prettier-php @prettier/some-other-plugin`
     required: false
-    default: false
+    default: ''
 
 runs:
   using: 'docker'