diff --git a/shipment_redis/requirements.txt b/shipment_redis/requirements.txt
index e9354c59..149e44e3 100644
--- a/shipment_redis/requirements.txt
+++ b/shipment_redis/requirements.txt
@@ -28,7 +28,7 @@ multiaddr==0.0.8
 mypy-extensions==0.4.3
 netaddr==0.7.19
 parsimonious==0.8.1
-protobuf==3.11.1
+protobuf==3.15.0
 pycryptodome==3.9.4
 pyrsistent==0.15.6
 redis==3.3.11