diff --git a/app/config.js b/app/config.js
index 85a9937db..8718db8cf 100644
--- a/app/config.js
+++ b/app/config.js
@@ -20,6 +20,9 @@ angular.module('portainer')
       }]
     });
     $httpProvider.interceptors.push('jwtInterceptor');
+    $httpProvider.defaults.headers.post['Content-Type'] = 'application/json';
+    $httpProvider.defaults.headers.put['Content-Type'] = 'application/json';
+    $httpProvider.defaults.headers.patch['Content-Type'] = 'application/json';
 
     AnalyticsProvider.setAccount('@@CONFIG_GA_ID');
     AnalyticsProvider.startOffline(true);