diff --git a/Dockerfile b/Dockerfile
index 67e1f90..711bc03 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/thallian/confd-env:3.17
+FROM docker.io/thallian/confd-env:3.18-3.1.5.0
 
 RUN apk add --no-cache \
     postfix \