diff --git a/Dockerfile b/Dockerfile
index ea51a3b..fcfbf9f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,13 +6,14 @@ RUN apt-get update \
     && curl https://raw.githubusercontent.com/composer/getcomposer.org/76a7060ccb93902cd7576b67264ad91c8a2700e2/web/installer | php -- --quiet \
     && docker-php-ext-configure pgsql \
     && docker-php-ext-install pdo pdo_pgsql pgsql \
-    && docker-php-source delete
+    && docker-php-source delete \
+    && awk 'NR==1 {print; print "\tservers {\n\t\ttrusted_proxies static private_ranges\n\t}\n"; next} 1' /etc/caddy/Caddyfile > /etc/caddy/Caddyfile.tmp \
+    && mv /etc/caddy/Caddyfile.tmp /etc/caddy/Caddyfile
 
 WORKDIR /app
 
 ENV COMPOSER_ALLOW_SUPERUSER=1
 ENV SERVER_NAME=":8080"
-ENV CADDY_SERVER_EXTRA_DIRECTIVES="trusted_proxies private_ranges"
 
 COPY package.json .
 COPY package-lock.json .