diff --git a/Dockerfile b/Dockerfile
index 367bc26..6982cb4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM mcansky/ruby_base
+FROM mcansky/base_ruby:2c7652fa95a2ab9419bb85e81a7c801ca6fa65d2
 
 # Set environment variables.
 ENV HOME /var/app
diff --git a/Gemfile b/Gemfile
index 16d895b..02a3cef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,5 @@
 source 'https://rubygems.org'
 gem 'sinatra'
-gem 'unicorn'
-gem 'capistrano', '2.15.5'
 gem 'haml'
 
 gem 'puma'