diff --git a/connector/setup.py b/connector/setup.py
index <HASH>..<HASH> 100755
--- a/connector/setup.py
+++ b/connector/setup.py
@@ -182,7 +182,7 @@ setup(
         'paramiko >= 1.15.1',
         'lxml >= 3.3.0',
         'ncclient >= 0.6.6',
-        'grpcio <= 1.36.1',
+        'grpcio <= 1.28.1',
         'cisco-gnmi >= 1.0.13, < 2.0.0',
     ],
revert grpcio to <I>