diff --git a/requirements.txt b/requirements.txt
index 4dbbc46..ea3f9f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ Keras-Preprocessing==1.1.0
 Markdown==3.1.1
 numpy==1.16.4
 opencv-python==4.1.0.25
-protobuf==3.9.0
+protobuf==3.15.0
 python-dateutil==2.8.0
 pytz==2019.1
 PyYAML==5.4