diff --git a/requirements.txt b/requirements.txt
index 7b332e1e..bd389298 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,7 +52,7 @@ netaddr==0.7.19
 netifaces==0.10.9
 phonenumbers==8.10.23
 prometheus-client==0.7.1
-protobuf==3.9.0
+protobuf==3.15.0
 psycopg2==2.8.3
 pyasn1==0.4.5
 pyasn1-modules==0.2.5