gridium.gemspec in gridium-0.1.5 vs gridium.gemspec in gridium-0.1.6

@@ -29,9 +29,9 @@
 
   spec.add_development_dependency "bundler", "~> 1.10"
   spec.add_development_dependency "rake", "~> 10.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 
-  spec.add_runtime_dependency "selenium-webdriver", ">= 2.45.0"
-  spec.add_runtime_dependency "oily_png", ">= 1.1.2"
+  spec.add_runtime_dependency "selenium-webdriver", "~> 2.45"
+  spec.add_runtime_dependency "oily_png", "~> 1.1", ">= 1.1.2"
 
 end