diff --git a/requirements.txt b/requirements.txt
index f95677c..debce1e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ Keras-Applications==1.0.6
 Keras-Preprocessing==1.0.5
 Markdown==3.0.1
 numpy==1.15.2
-protobuf==3.6.1
+protobuf==3.15.0
 pygame==1.9.6
 PyYAML==3.13
 scipy==1.1.0