diff --git a/requirements.txt b/requirements.txt
index 29bbd06..920b6f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ pexpect==4.6.0
 pickleshare==0.7.5
 Pillow>=7.1.0
 prompt-toolkit==1.0.15
-protobuf==3.15.0
+protobuf==3.18.3
 ptyprocess==0.6.0
 pycparser==2.19
 Pygments==2.7.4