diff --git a/requirements.txt b/requirements.txt
index 98c42b4..f02fe52 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ Markdown==3.0.1
 MarkupSafe==1.1.0
 numpy==1.15.4
 pandas==0.23.4
-protobuf==3.6.1
+protobuf==3.15.0
 python-dateutil==2.7.5
 pytz==2018.7
 PyYAML==3.13