diff --git a/Dockerfile b/Dockerfile
index 44a828d..c53c018 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
 # syntax=docker/dockerfile:1
 
 ARG RRDCACHED_VERSION=1.9.0
-ARG RRDCACHED_RELEASE=r0
+ARG RRDCACHED_RELEASE=r4
 
-FROM crazymax/alpine-s6:3.21-2.2.0.3
+FROM crazymax/alpine-s6:3.22-2.2.0.3
 
 ENV TZ="UTC" \
   PUID="1000" \