diff --git a/src/main.ts b/src/main.ts
index 5fdb88eb..5ab51f53 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -10,4 +10,4 @@ const main = async (): Promise<void> => {
   })
 }
 
-main().catch((e) => core.setFailed(e instanceof Error ? e.message : JSON.stringify(e)))
+main().catch((e) => core.setFailed(e instanceof Error ? e : String(e)))