diff --git a/tutorials/ServingHandsOn/serving_requirements.txt b/tutorials/ServingHandsOn/serving_requirements.txt
index e6c61d6..85711cf 100644
--- a/tutorials/ServingHandsOn/serving_requirements.txt
+++ b/tutorials/ServingHandsOn/serving_requirements.txt
@@ -18,7 +18,7 @@ matplotlib==3.1.0
 mccabe==0.6.1
 numpy==1.16.4
 pandas==0.24.2
-protobuf==3.8.0
+protobuf==3.15.0
 pycodestyle==2.5.0
 pylint==2.3.1
 pyparsing==2.4.0