my_utilities.gemspec in my_utilities-1.3.0 vs my_utilities.gemspec in my_utilities-2.0.0

@@ -17,12 +17,12 @@
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(spec)/})
   spec.require_paths = ["lib"]
 
   if !(RUBY_VERSION =~ /^2.1/)
-    spec.add_dependency 'getopt'
+    spec.add_dependency 'getopt', "~>1.3"
   end 
 
-  spec.add_development_dependency "bundler", "~> 1.3"
-  spec.add_development_dependency 'rspec'
-  spec.add_development_dependency "rake"
+  spec.add_development_dependency "bundler", "~>1.16"
+  spec.add_development_dependency 'rspec', "~>3.5"  
+  spec.add_development_dependency "rake", "~>12.3"
 end