diff --git a/requirements.txt b/requirements.txt
index 373912d..b26330d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ parso==0.1.0
 pexpect==4.2.1
 pickleshare==0.7.4
 prompt-toolkit==1.0.15
-protobuf==3.4.0
+protobuf==3.18.3
 ptyprocess==0.5.2
 Pygments==2.2.0
 pyparsing==2.2.0