diff --git a/pip-requirements.txt b/pip-requirements.txt
index acdc494..745b3c2 100644
--- a/pip-requirements.txt
+++ b/pip-requirements.txt
@@ -15,7 +15,7 @@ Markdown==2.6.11
 mock==2.0.0
 numpy==1.14.5
 pbr==4.0.4
-protobuf==3.6.0
+protobuf==3.15.0
 python-dateutil==2.7.3
 requests==2.19.1
 scikit-learn==0.19.1