diff --git a/webnotes/utils/verified_command.py b/webnotes/utils/verified_command.py
index 600bc5e591..9c43aa2ac7 100644
--- a/webnotes/utils/verified_command.py
+++ b/webnotes/utils/verified_command.py
@@ -14,7 +14,7 @@ def get_url(params, nonce, secret=None):
 	return ''.join([webnotes.local.request.url_root, '?', urllib.urlencode(params)])
 	
 def get_signature(params, nonce, secret=None):
-	params = "".join((cstr(p) for p in params))
+	params = "".join((cstr(p) for p in params.values()))
 	if not secret:
 		secret = webnotes.local.conf.get("secret") or "secret"