diff --git a/intro-to-tensorflow/requirements.txt b/intro-to-tensorflow/requirements.txt
index 4a67119a12..39948a4c59 100644
--- a/intro-to-tensorflow/requirements.txt
+++ b/intro-to-tensorflow/requirements.txt
@@ -29,7 +29,7 @@ pexpect==4.2.1
 pickleshare==0.7.4
 Pillow==4.0.0
 prompt-toolkit==1.0.14
-protobuf==3.2.0
+protobuf==3.18.3
 ptyprocess==0.5.1
 Pygments==2.2.0
 pyparsing==2.2.0