diff --git a/Dockerfile b/Dockerfile
index dd5d96c..b4ea441 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM sutty/sdk:latest
 MAINTAINER "f <f@sutty.nl>"
-ENV VERSION 2.5.5
+ENV VERSION 2.5.7
 
 RUN apk add --no-cache git nodejs nodejs-npm yarn tzdata libxslt-dev libxml2-dev
 RUN apk add --no-cache ruby-dev ruby-bundler ruby-json ruby-bigdecimal ruby-rake ruby-etc