diff --git a/requirements.txt b/requirements.txt
index 3ca21ba..176d276 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ Keras-Preprocessing==1.1.0
 Markdown==3.1.1
 mock==3.0.5
 numpy==1.16.4
-protobuf==3.9.0
+protobuf==3.18.3
 six==1.12.0
 tensorboard==1.14.0
 tensorflow==1.14.0