diff --git a/apprise/plugins/NotifyFreeMobile.py b/apprise/plugins/NotifyFreeMobile.py
index 4aad8db3..2b460c13 100644
--- a/apprise/plugins/NotifyFreeMobile.py
+++ b/apprise/plugins/NotifyFreeMobile.py
@@ -126,6 +126,7 @@ class NotifyFreeMobile(NotifyBase):
         # prepare our headers
         headers = {
             'User-Agent': self.app_id,
+            'Content-Type': 'application/json',
         }
 
         # Prepare our payload