diff --git a/docker/proxy/.env.example b/docker/proxy/.env.example
index ee3a01f..6d1ebfc 100644
--- a/docker/proxy/.env.example
+++ b/docker/proxy/.env.example
@@ -1,3 +1,6 @@
+# ACME (Let's Encrypt)
+ACME_EMAIL=
+
 # Cloudflare
 CF_API_TOKEN=
 
diff --git a/docker/proxy/Caddyfile b/docker/proxy/Caddyfile
index 41ada4c..4580d72 100644
--- a/docker/proxy/Caddyfile
+++ b/docker/proxy/Caddyfile
@@ -1,6 +1,6 @@
-tls {
-	dns cloudflare {env.CF_API_TOKEN}
-	resolvers 1.1.1.1
+{
+	email {env.ACME_EMAIL}
+	acme_dns cloudflare {env.CF_API_TOKEN}
 }
 
 servers {