diff --git a/GSLAdditions.podspec b/GSLAdditions.podspec
index 1c7869c..7a5a387 100644
--- a/GSLAdditions.podspec
+++ b/GSLAdditions.podspec
@@ -8,9 +8,14 @@ Pod::Spec.new do |s|
   s.summary      = 'Objective-C GSL categories for iOS, macOS, watchOS and tvOS.'
   s.requires_arc = true
 
+  s.ios.deployment_target = '9.0'
+  s.macos.deployment_target = '10.9'
+  s.tvos.deployment_target = '9.0'
+  s.watchos.deployment_target = '2.0'
+
   s.subspec 'FoundationGSLAdditions' do |sp|
     sp.ios.deployment_target = '9.0'
-    sp.osx.deployment_target = '10.9'
+    sp.macos.deployment_target = '10.9'
     sp.tvos.deployment_target = '9.0'
     sp.watchos.deployment_target = '2.0'
     sp.source_files = 'FoundationGSLAdditions/*.{h,m}'