diff --git a/requirements.txt b/requirements.txt
index 1c66d34..d63b8f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ Keras-Preprocessing==1.1.0
 Markdown==3.1.1
 mock==3.0.5
 numpy==1.16.4
-protobuf==3.8.0
+protobuf==3.18.3
 six==1.12.0
 tensorboard==1.13.1
 tensorflow==1.13.1