diff --git a/src/core/service/api/network/request.js b/src/core/service/api/network/request.js
index 5360b715db19f245e32cfcc33b61f28019dcd0eb..cb5b7728114698f353db380a59ba359ae79f2bcf 100644
--- a/src/core/service/api/network/request.js
+++ b/src/core/service/api/network/request.js
@@ -100,7 +100,14 @@ class RequestTask {
 }
 
 export function request (args, callbackId) {
-  if (args.method !== 'GET' && args.header['Content-Type'].indexOf('application/json') === 0 && isPlainObject(args.data)) {
+  let contentType
+  for (const name in args.header) {
+    if (name.toLowerCase() === 'content-type') {
+      contentType = args.header[name]
+      break
+    }
+  }
+  if (args.method !== 'GET' && contentType.indexOf('application/json') === 0 && isPlainObject(args.data)) {
     args.data = JSON.stringify(args.data)
   }
   const {