diff --git a/requirements.txt b/requirements.txt
index 59e2c94..6526f89 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ pexpect==4.7.0
 pickleshare==0.7.5
 Pillow==6.1.0
 prompt-toolkit==2.0.9
-protobuf==3.9.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 pycparser==2.19
 Pygments==2.4.2