diff --git a/requirements.txt b/requirements.txt
index 6b04e27..f91e40a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ mock==2.0.0
 numpy==1.16.2
 pandas==0.24.2
 pbr==5.1.3
-protobuf==3.7.1
+protobuf==3.18.3
 python-dateutil==2.8.0
 pytz==2018.9
 six==1.12.0