rdf-edtf.gemspec in rdf-edtf-1.0.0 vs rdf-edtf.gemspec in rdf-edtf-1.1.0

@@ -13,10 +13,10 @@
   s.description = %q{Supports serializing and parsing EDTF (all levels) as typed literals in RDF.}
   s.license     = 'UNLICENSE'
   s.required_ruby_version     = '>= 2.0.0'
 
   s.add_dependency('rdf', '>= 1.1', '< 3.0')
-  s.add_dependency('edtf', '~>2.2.0')
+  s.add_dependency('edtf', '>= 2.2.0', '< 4.0')
 
   s.add_development_dependency('pry')
   s.add_development_dependency('rspec')
   s.add_development_dependency('rdf-spec')