diff --git a/requirements.txt b/requirements.txt
index 07c911b..8f4d744 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ numpy==1.16.3
 numpydoc==0.9.1
 packaging==19.0
 pandas==0.24.2
-protobuf==3.7.1
+protobuf==3.15.0
 Pygments==2.4.2
 pykalman==0.9.5
 pyparsing==2.4.0