diff --git a/debian/patches/0018-loosen-rdoc.patch b/debian/patches/0018-loosen-rdoc.patch
new file mode 100644
index 0000000000..62ee9ae664
--- /dev/null
+++ b/debian/patches/0018-loosen-rdoc.patch
@@ -0,0 +1,13 @@
+Index: gitlab/Gemfile
+===================================================================
+--- gitlab.orig/Gemfile
++++ gitlab/Gemfile
+@@ -104,7 +104,7 @@ gem 'task_list',     '~> 1.0.2', require
+ gem 'github-markup', '~> 1.3.1'
+ gem 'redcarpet',     '~> 3.2.3'
+ gem 'RedCloth',      '~> 4.2.9'
+-gem 'rdoc',          '~>3.6'
++gem 'rdoc',          '~> 4.1'
+ gem 'org-ruby',      '~> 0.9.12'
+ gem 'creole',        '~>0.3.6'
+ gem 'wikicloth',     '0.8.1'
diff --git a/debian/patches/series b/debian/patches/series
index 46233c9ea1..0bd12a20e6 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -15,3 +15,4 @@ loosen-rails-version.patch
 0015-loosen-carrierwave.patch
 0016-loosen-fog.patch
 0017-loosen-redcarpet.patch
+0018-loosen-rdoc.patch