diff --git a/Dockerfile b/Dockerfile
index e1ef40c..dc37408 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,8 @@ ENV S6_BEHAVIOUR_IF_STAGE2_FAILS=2
 RUN \
  apk add --no-cache \
 	curl \
+	lua5.1-cjson \
+	lua5.1-resty-http \
 	memcached \
 	nginx-mod-http-echo \
 	nginx-mod-http-fancyindex \