diff --git a/requirements.txt b/requirements.txt
index 4958468..9a42732 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ MarkupSafe==1.1.0
 multidict==4.5.2
 numpy==1.15.4
 opencv-python==3.4.4.19
-protobuf==3.6.1
+protobuf==3.15.0
 PyYAML==3.13
 requests==2.20.1
 scipy==1.1.0