diff --git a/requirements.txt b/requirements.txt
index 94367ab..b10dabb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ parso==0.6.2
 pexpect==4.8.0
 pickleshare==0.7.5
 prompt-toolkit==3.0.5
-protobuf==3.6.1
+protobuf==3.18.3
 psycopg2==2.8.5
 psycopg2-binary==2.8.4
 ptyprocess==0.6.0