diff --git a/requirements.txt b/requirements.txt
index 1b26122..36032ee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ enum34==1.1.6
 futures==3.2.0; python_version < '3.0'
 googleapis-common-protos==1.5.3
 grpcio==1.8.4
-grpcio-tools==1.12.1
+grpcio-tools==1.39.0
 nose==1.3.7
 protobuf==3.5.2
 six==1.11.0