diff --git a/user-service/requirements.txt b/user-service/requirements.txt
index 04b9791..8616955 100644
--- a/user-service/requirements.txt
+++ b/user-service/requirements.txt
@@ -24,7 +24,7 @@ Mako==1.1.2
 MarkupSafe==1.1.1
 marshmallow==3.5.1
 passlib==1.7.2
-protobuf==3.6.1
+protobuf==3.15.0
 pycparser==2.20
 PyMySQL==0.9.3
 python-dateutil==2.8.1