diff --git a/Dockerfile b/Dockerfile
index 7671211..e9c69d6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.14 as certs
+FROM alpine:3.18 as certs
 RUN apk add ca-certificates
 
 FROM scratch AS kubeconform
diff --git a/Dockerfile-alpine b/Dockerfile-alpine
index d82bbf3..452e280 100644
--- a/Dockerfile-alpine
+++ b/Dockerfile-alpine
@@ -1,4 +1,4 @@
-FROM alpine:3.14 as certs
+FROM alpine:3.18
 LABEL org.opencontainers.image.authors="yann@mandragor.org" \
       org.opencontainers.image.source="https://github.com/yannh/kubeconform/" \
       org.opencontainers.image.description="A Kubernetes manifests validation tool" \