diff --git a/requirements.txt b/requirements.txt
index c304d42..4d3ed9f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ Keras-Preprocessing==1.1.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
 numpy==1.17.4
-protobuf==3.11.1
+protobuf==3.15.0
 PyYAML==5.2
 scipy==1.3.3
 six==1.13.0