diff --git a/requirements.txt b/requirements.txt
index 67b9b56..87308b7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ matplotlib==3.1.1
 numpy==1.17.2
 pandas==0.25.1
 Pillow==6.2.0
-protobuf==3.9.2
+protobuf==3.15.0
 pyparsing==2.4.2
 python-dateutil==2.8.0
 pytz==2019.2