diff --git a/Dockerfile b/Dockerfile
index b559a3d..b433937 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM ghcr.io/sigstore/cosign/cosign:latest@sha256:33a6a55d2f1354bc989b791974cf4ee00a900ab9e4e54b393962321758eee3c6 as cosign
 
-FROM node:18.6.0-alpine@sha256:cd8f5b451e927f3c5c92016cfaf9d6805999faeded64486d8f76c9d4ef6f1b5c
+FROM node:18.8.0-alpine@sha256:a8409dff6597f2ef5f7ecd3c672671bb2af9a390073efd74f95c54aa41cba22a
 COPY --from=cosign /ko-app/cosign /usr/local/bin/cosign
 WORKDIR /app