diff --git a/debian/patches/0350-relax-rdoc.patch b/debian/patches/0350-relax-rdoc.patch
new file mode 100644
index 0000000000..e94b6a23f1
--- /dev/null
+++ b/debian/patches/0350-relax-rdoc.patch
@@ -0,0 +1,11 @@
+--- a/Gemfile
++++ b/Gemfile
+@@ -141,7 +141,7 @@
+ gem 'github-markup', '~> 1.7', require: 'github/markup'
+ gem 'commonmarker', '~> 0.20'
+ gem 'RedCloth', '~> 4.3', '>= 4.3.2'
+-gem 'rdoc', '~> 6.1', '>= 6.1.2'
++gem 'rdoc', '~> 6.0'
+ gem 'org-ruby', '~> 0.9.12'
+ gem 'creole', '~> 0.5.0'
+ gem 'wikicloth', '0.8.1'
diff --git a/debian/patches/series b/debian/patches/series
index dc465a3de5..9801127833 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -3,6 +3,7 @@
 0110-make-test-dependencies-conditional.patch
 0340-relax-httparty.patch
 #0400-Relax-recaptcha-version.patch
+0350-relax-rdoc.patch
 0430-remove-gitlab-markup.patch
 0440-remove-puma.patch
 0460-embed-derailed-benchmarks.patch