diff --git a/rdf-reasoner.gemspec b/rdf-reasoner.gemspec
index 5bd0dbb..2216e4b 100755
--- a/rdf-reasoner.gemspec
+++ b/rdf-reasoner.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version      = '>= 2.4'
   gem.requirements               = []
-  gem.add_runtime_dependency     'rdf',             '~> 3.1', '>= 3.1.11'
+  gem.add_runtime_dependency     'rdf',             '~> 3.1', '>= 3.1.12'
   gem.add_runtime_dependency     'rdf-xsd',         '~> 3.1'
 
   gem.add_development_dependency 'rdf-spec',        '~> 3.1'