diff --git a/requirements.txt b/requirements.txt
index b084715..7e5a359 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,7 @@ pickleshare==0.7.5
 Pillow==5.4.1
 prometheus-client==0.5.0
 prompt-toolkit==1.0.15
-protobuf==3.6.1
+protobuf==3.18.3
 ptyprocess==0.6.0
 pycodestyle==2.5.0
 Pygments==2.3.1