diff --git a/Dockerfile b/Dockerfile
index 515f7e4..e98865d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -47,5 +47,9 @@ VOLUME /var/cache/munin
 
 EXPOSE 80
 
+# health check
+HEALTHCHECK --interval=5m --timeout=3s \
+  CMD curl -f http://localhost/munin/ || exit 1
+
 # launcher
 CMD ["/usr/local/bin/run"]