diff --git a/grpc/Dockerfile b/grpc/Dockerfile
index 458e29f..2303f0d 100644
--- a/grpc/Dockerfile
+++ b/grpc/Dockerfile
@@ -2,7 +2,7 @@
 FROM golang:1.23 AS builder
 
 # renovate: datasource=github-releases depName=grpc/grpc-go
-ARG GRPC_GO_VERSION=v1.65.0
+ARG GRPC_GO_VERSION=v1.66.0
 
 ADD https://github.com/grpc/grpc-go.git#${GRPC_GO_VERSION} /grpc-go