diff --git a/requirements.txt b/requirements.txt
index 6598748..3620434 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ Markdown==3.1
 mock==2.0.0
 numpy==1.16.3
 pbr==5.2.0
-protobuf==3.7.1
+protobuf==3.18.3
 six==1.12.0
 tensorboard==1.13.1
 tensorflow==1.13.1