diff --git a/README.markdown b/README.markdown
index 97f5b1f..6587207 100644
--- a/README.markdown
+++ b/README.markdown
@@ -123,13 +123,13 @@ in Sound Preferences. Use 'default' for the default notification sound.
 
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-`-reply`
+`-reply` **[10.9+ only]**
 
 The notification will be displayed as a reply type alert.
 
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-`-actions VALUE1,VALUE2,"VALUE 3"`
+`-actions VALUE1,VALUE2,"VALUE 3"` **[10.9+ only]**
 
 The notification actions avalaible.
 When you provide more than one value, a dropdown will be displayed.
@@ -138,14 +138,14 @@ Does not work when -reply is used
 
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-`-dropdownLabel VALUE`
+`-dropdownLabel VALUE` **[10.9+ only]**
 
 The notification actions dropdown title (only when multiples -actions values are provided).
 Does not work when -reply is used
 
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-`-closeLabel VALUE`
+`-closeLabel VALUE` **[10.9+ only]**
 
 The notification "Close" button label.