diff --git a/Dockerfile b/Dockerfile
index 71a2ca0..e9451d4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -10,6 +10,6 @@ COPY . .
 RUN go install .
 
 # package
-FROM alpine:3.18.4@sha256:eece025e432126ce23f223450a0326fbebde39cdf496a85d8c016293fc851978
+FROM alpine:3.18.5@sha256:34871e7290500828b39e22294660bee86d966bc0017544e848dd9a255cdf59e0
 COPY --from=compile /go/bin/k8s-gitlab-gc /k8s-gitlab-gc
 ENTRYPOINT ["/k8s-gitlab-gc"]