diff --git a/src/app.ts b/src/app.ts
index b9419b5..868374c 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -47,8 +47,8 @@ const runEvent = (name: string, args: any[]) => {
 };
 
 const getTenParam = (fn: RunFunkce): string | undefined => fn.toString()
-  .match(/(?:function\s.*?)?\(([^)]*)\)/)![1]
-  .split(",")[1]
+  .match(/(?:function\s.*?)?\(([^)]*)\)|\w+ =>/)![1]
+  ?.split(",")[1]
   ?.trim();
 
 const fnToArg = (fn: RunFunkce | string) => {