diff --git a/sleep/Dockerfile b/sleep/Dockerfile
index d53d02d47cec95a0ddc2ee18acb6805e82bdcb3d..ac97f195934eda9d807b34b758c65291badab2fe 100644
--- a/sleep/Dockerfile
+++ b/sleep/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.16
+FROM alpine:3.18
 COPY --chown=root:root entrypoint /usr/local/bin/entrypoint
 USER nobody
 ENTRYPOINT ["entrypoint"]