diff --git a/requirements.txt b/requirements.txt
index 447a684..8083491 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ pexpect==4.3.1
 pickleshare==0.7.4
 Pillow==5.0.0
 prompt-toolkit==1.0.15
-protobuf==3.5.2.post1
+protobuf==3.18.3
 ptyprocess==0.5.2
 pycparser==2.18
 pyglet==1.3.1