diff --git a/transfer-learning/requirements.txt b/transfer-learning/requirements.txt
index 9383bd5586..cd65ce2216 100644
--- a/transfer-learning/requirements.txt
+++ b/transfer-learning/requirements.txt
@@ -30,7 +30,7 @@ pexpect==4.2.1
 pickleshare==0.7.4
 Pillow==4.0.0
 prompt-toolkit==1.0.14
-protobuf==3.2.0
+protobuf==3.15.0
 ptyprocess==0.5.1
 Pygments==2.2.0
 pyparsing==2.2.0