diff --git a/requirements.txt b/requirements.txt
index 075f8e1..00332b7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ MarkupSafe==1.1.1
 mock==2.0.0
 numpy==1.16.2
 pbr==5.1.3
-protobuf==3.7.0
+protobuf==3.15.0
 python-dateutil==2.8.0
 pyzmq==18.0.1
 requests==2.21.0