diff --git a/optional/unbound/Dockerfile b/optional/unbound/Dockerfile
index abb45420..2b472d44 100644
--- a/optional/unbound/Dockerfile
+++ b/optional/unbound/Dockerfile
@@ -1,4 +1,4 @@
-ARG DISTRO=alpine:3.12
+ARG DISTRO=alpine:3.14
 FROM $DISTRO
 # python3 shared with most images
 RUN apk add --no-cache \