diff --git a/Dockerfile b/Dockerfile
index 1faf489..2a79a3d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM alpine:3.15.5
 
-ARG UNBOUND_VERSION=1.17.0
+ARG UNBOUND_VERSION=1.18.0
 
 # Install dependencies and build unbound, clean up after
 RUN apk --update add --no-cache alpine-sdk bison dns-root-hints expat-dev flex git openssl-dev && \
@@ -20,11 +20,10 @@ RUN apk --update add --no-cache alpine-sdk bison dns-root-hints expat-dev flex g
 COPY entrypoint.sh /srv/
 COPY healthcheck.sh /srv/
 
-## Prepare unbound
-RUN addgroup -S unbound
-RUN adduser -S -G unbound unbound
+# Prepare unbound
+RUN addgroup -S unbound && adduser -S -G unbound unbound
 RUN mkdir -p /srv/unbound/conf
 COPY unbound.conf /srv/unbound/unbound.conf
 
-HEALTHCHECK --interval=30s --timeout=2s --retries=1 CMD sh /srv/healthcheck.sh
+HEALTHCHECK --interval=10s --timeout=1s --retries=1 CMD sh /srv/healthcheck.sh
 ENTRYPOINT ["sh", "/srv/entrypoint.sh"]