diff --git a/action.yml b/action.yml
index 16d6c6f..22ec0bc 100644
--- a/action.yml
+++ b/action.yml
@@ -10,6 +10,7 @@ inputs:
     required: false
   bun-version-file:
     description: 'The version of Bun to install from file. (e.g. "package.json", ".bumrc", ".tool-versions")'
+    default: ".bun-version"
     required: false
   bun-download-url:
     description: "Override the URL to download Bun from. This skips version resolution and verifying AVX2 support."