diff --git a/Gemfile b/Gemfile
index 8e4f6d3b9..a80399315 100644
--- a/Gemfile
+++ b/Gemfile
@@ -50,6 +50,7 @@ gem 'passenger', '6.0.14', require: 'phusion_passenger/rack_handler'
 gem 'pg', '~> 1.3.5'
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 6.0'
+gem 'rdf', git: 'https://github.com/ruby-rdf/rdf.git', branch: '3.2.11-patch'
 # Use Redis adapter to run Action Cable in production
 gem 'redis', '~> 4.5.0'
 gem 'riiif', '~> 2.5.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 0ab0a4023..d9a47908b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -74,6 +74,14 @@ GIT
       valkyrie (~> 3.0.1)
       view_component (~> 2.74.1)
 
+GIT
+  remote: https://github.com/ruby-rdf/rdf.git
+  revision: 01cd7b6fc15af0ca97b8543e460abe8dd8b41991
+  branch: 3.2.11-patch
+  specs:
+    rdf (3.2.11)
+      link_header (~> 0.0, >= 0.0.8)
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -756,8 +764,6 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rdf (3.2.11)
-      link_header (~> 0.0, >= 0.0.8)
     rdf-aggregate-repo (3.2.1)
       rdf (~> 3.2)
     rdf-isomorphic (3.2.1)
@@ -1115,6 +1121,7 @@ DEPENDENCIES
   pg (~> 1.3.5)
   puma
   rails (~> 6.0)
+  rdf!
   redis (~> 4.5.0)
   riiif (~> 2.5.0)
   roo (~> 2.9.0)