diff --git a/app/requirements.txt b/app/requirements.txt
index 1673bb4..4ffee77 100644
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -48,7 +48,7 @@ moto==1.3.7
 oauth2client==4.1.3
 pbr==5.1.2
 Pillow==5.4.1
-protobuf==3.6.1
+protobuf==3.18.3
 pyaml==18.11.0
 pyasn1==0.4.5
 pyasn1-modules==0.2.4