grom.gemspec in grom-1.0.0 vs grom.gemspec in grom-1.0.1

@@ -19,12 +19,12 @@
   end
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_dependency 'rdf', '~> 3'
+  spec.add_dependency 'rdf', '~> 2'
   # Defines RDF vocabularies
-  spec.add_dependency 'rdf-vocab', '~> 3'
+  spec.add_dependency 'rdf-vocab', '~> 2'
   spec.add_dependency 'activesupport', '>= 5.0.0.1'
 
   # the below are test dependencies
   spec.add_development_dependency 'bundler', '~> 1.13'
   spec.add_development_dependency 'rake', '~> 10.0'