diff --git a/MSWeakTimer.podspec b/MSWeakTimer.podspec
index b284100..2fd4948 100644
--- a/MSWeakTimer.podspec
+++ b/MSWeakTimer.podspec
@@ -8,8 +8,9 @@ Pod::Spec.new do |s|
   s.author       = { "Javier Soto" => "ios@javisoto.es" }
   
   s.source       = { :git => "https://github.com/mindsnacks/MSWeakTimer.git", :tag => s.version.to_s }
-  s.platform     = :ios, '5.0'
-  s.platform     = :tvos, '9.0'
+  s.ios.deployment_target = '5.0'
+  s.osx.deployment_target = '10.9'
+  s.tvos.deployment_target = '9.0'
   s.source_files = 'MSWeakTimer/MSWeakTimer.{h,m}'
   s.requires_arc = true
 end