diff --git a/Dockerfile b/Dockerfile
index d45645e..eda0356 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,13 @@
+# renovate: datasource=github-releases depName=jasonlovesdoggo/caddy-defender
+ARG CADDYDEFENDER_VERSION=v0.8.5
+# renovate: datasource=github-releases depName=caddy-dns/rfc2136
+ARG CADDYRFC2136_VERSION=v1.0.0
+
 FROM caddy:2.9.1-builder-alpine@sha256:77a6376a7f8074e856ffdb339054d28b93bd6cc68c82e34b675b0b39b1a25689 AS builder
 
 RUN xcaddy build \
-    --with github.com/caddy-dns/rfc2136@e50b9f25dd68882c76758446195aca0507be3c05 \
-    --with github.com/jasonlovesdoggo/caddy-defender@c7ba3d4f6cdfb76886cf3998cff77eaabe456443
+    --with github.com/caddy-dns/rfc2136@${CADDYRFC2136_VERSION} \
+    --with github.com/jasonlovesdoggo/caddy-defender@${CADDYDEFENDER_VERSION}
 
 FROM caddy:2.9.1-alpine@sha256:b1843ebe13997299e8639d208f1b94e5d849dd0f31047652e62ab56b1ec881a9