diff --git a/requirements.txt b/requirements.txt
index 1e1099e..0aef5db 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ pexpect==4.7.0
 pickleshare==0.7.5
 pluggy==0.12.0
 prompt-toolkit==2.0.9
-protobuf==3.8.0
+protobuf==3.18.3
 ptyprocess==0.6.0
 py==1.8.0
 Pygments==2.4.2