diff --git a/requirements.txt b/requirements.txt
index b6ecf47..3b78a4b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ mock==2.0.0
 numpy==1.12.1
 pathspec==0.5.0
 pbr==3.0.0
-protobuf==3.2.0
+protobuf==3.18.3
 psycopg2==2.7.1
 python-dateutil==2.6.0
 python-editor==1.0.3