diff --git a/hw2/src/requirements.txt b/hw2/src/requirements.txt
index 0caa1b6..db6be15 100644
--- a/hw2/src/requirements.txt
+++ b/hw2/src/requirements.txt
@@ -56,7 +56,7 @@ pickleshare==0.7.5
 pipreqs==0.4.9
 prometheus-client==0.7.1
 prompt-toolkit==2.0.9
-protobuf==3.8.0
+protobuf==3.15.0
 ptyprocess==0.6.0
 Pygments==2.4.2
 pygpu==0.7.6