diff --git a/Dockerfile b/Dockerfile
index b4ea441..8ce8cba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM sutty/sdk:latest
 MAINTAINER "f <f@sutty.nl>"
-ENV VERSION 2.5.7
+ENV VERSION 2.6.6
 
 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
@@ -15,6 +15,6 @@ RUN install -dm 2750 -o app -g www-data /home/app/sutty
 # https://github.com/rubygems/rubygems/issues/2918
 # https://gitlab.alpinelinux.org/alpine/aports/issues/10808
 COPY ./rubygems-platform-musl.patch /tmp/
-RUN patch -d /usr/lib/ruby/2.5.0 -Np 0 -i /tmp/rubygems-platform-musl.patch
+RUN patch -d /usr/lib/ruby/2.6.0 -Np 0 -i /tmp/rubygems-platform-musl.patch
 
 ENTRYPOINT /bin/sh