Rakefile in sinatra-rdiscount-0.9.4.0 vs Rakefile in sinatra-rdiscount-0.9.4.2

@@ -10,10 +10,10 @@
     gem.email = "[e-mail]"
     gem.homepage = "http://github.com/wbzyl/sinatra-rdiscount"
     gem.description = gem.summary
     gem.authors = ["Wlodek Bzyl"]
     
-    gem.add_runtime_dependency 'sinatra', '=0.9.4'
+    gem.add_runtime_dependency 'sinatra', '~>0.9'
     gem.add_runtime_dependency 'erubis', '>=2.6.5'
     gem.add_runtime_dependency 'rdiscount', '>=1.5.8'      
     
     gem.add_development_dependency 'rack', '>=1.1.0'
     gem.add_development_dependency 'rack-test', '>=0.5.3'