diff --git a/requirements.txt b/requirements.txt
index 8613afd..9138063 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ pexpect==4.6.0
 pickleshare==0.7.4
 Pillow==5.1.0
 prompt-toolkit==1.0.15
-protobuf==3.6.0
+protobuf==3.18.3
 ptyprocess==0.5.2
 pyparsing==2.2.0
 python-dateutil==2.7.3