diff --git a/.travis.yml b/.travis.yml
index e8baa19bac..62bf826502 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -39,7 +39,7 @@ cache:
     - frontend/node_modules
     - frontend/bower_components
 
-bundler_args: --without development production
+bundler_args: --without development production docker
 
 branches:
   only:
diff --git a/Gemfile b/Gemfile
index 03283d2f55..495cf6c67a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -233,9 +233,12 @@ group :opf_plugins do
   gem 'openproject-translations', git:'https://github.com/opf/openproject-translations.git', branch: 'release/5.0'
 end
 
-gem 'passenger'
+# TODO: Make this group :optional when bundler v10.x
+# is matured enough that we can use this everywhere
+# http://bundler.io/blog/2015/06/24/version-1-10-released.html
+group :docker do
+  gem 'passenger'
 
-group :production do
   # Used to easily precompile assets
   gem 'sqlite3', require: false
   gem 'rails_12factor', require: !!ENV['HEROKU']
diff --git a/doc/operation_guides/manual/installation-guide.md b/doc/operation_guides/manual/installation-guide.md
index 96eb05d005..aa7f058515 100644
--- a/doc/operation_guides/manual/installation-guide.md
+++ b/doc/operation_guides/manual/installation-guide.md
@@ -146,7 +146,7 @@ with OpenProject. For more information, see https://github.com/opf/openproject-c
 [openproject@host] git clone https://github.com/opf/openproject-ce.git --branch stable/5 --depth 1
 [openproject@host] cd openproject-ce
 [openproject@host] gem install bundler
-[openproject@host] bundle install --deployment --without postgres sqlite development test therubyracer
+[openproject@host] bundle install --deployment --without postgres sqlite development test therubyracer docker
 [openproject@host] npm install
 ```