diff --git a/Lesson01/activity_2/requirements.txt b/Lesson01/activity_2/requirements.txt
index c9eebbf..7ff1611 100644
--- a/Lesson01/activity_2/requirements.txt
+++ b/Lesson01/activity_2/requirements.txt
@@ -51,7 +51,7 @@ pexpect==4.3.1
 pickleshare==0.7.4
 ply==3.10
 prompt-toolkit==1.0.15
-protobuf==3.5.0.post1
+protobuf==3.18.3
 ptyprocess==0.5.2
 pydot==1.2.3
 Pygments==2.2.0