diff --git a/docker/Dockerfile b/docker/Dockerfile
index b48dbaa63..753bec819 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -36,7 +36,7 @@ RUN chown -R $USER:$GROUP /usr/local/etc/php-fpm.d
 
 ####################
 
-FROM caddy:2.8.4-builder-alpine AS builder-caddy
+FROM caddy:2.9.1-builder-alpine AS builder-caddy
 
 # Build Caddy with the Mercure and Vulcain and brotil cache modules
 RUN xcaddy build \