diff --git a/requirements.txt b/requirements.txt
index 7e099ab..5d00137 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ nltk==3.2.5
 numpy==1.14.1
 pbr==3.1.1
 Pillow==5.0.0
-protobuf==3.5.1
+protobuf==3.18.3
 psycopg2==2.7.4
 python-dateutil==2.6.1
 pytz==2018.3