diff --git a/zulip_botserver/zulip_botserver/server.py b/zulip_botserver/zulip_botserver/server.py
index d9fde80..17545f8 100644
--- a/zulip_botserver/zulip_botserver/server.py
+++ b/zulip_botserver/zulip_botserver/server.py
@@ -42,8 +42,8 @@ def load_lib_modules():
             lib_module = import_module(module_name)
             bots_lib_module[bot] = lib_module
         except ImportError:
-            print("\n Import Error: Bot \"{}\" doesn't exists. Please make sure you have set up the flaskbotrc "
-                  "file correctly.\n".format(bot))
+            raise ImportError("\n Import Error: Bot \"{}\" doesn't exists. Please make sure you have set up the flaskbotrc "
+                              "file correctly.\n".format(bot))
 
 def load_bot_handlers():
     # type: () -> Any