diff --git a/lib/rpc_backend b/lib/rpc_backend
index 14c78fb..4c1efa6 100644
--- a/lib/rpc_backend
+++ b/lib/rpc_backend
@@ -1,3 +1,5 @@
+#!/bin/bash
+#
 # lib/rpc_backend
 # Interface for interactig with different rpc backend
 # rpc backend settings