diff --git a/requirements.txt b/requirements.txt
index 52209f2f..d73e8608 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ kombu==3.0.37
 meld3==1.0.2
 monotonic==1.3
 polyline==1.3.2
-protobuf==3.4.0
+protobuf==3.18.3
 pyasn1==0.3.2
 pyasn1-modules==0.0.11
 pytz==2017.2