diff --git a/modules/adfBidAdapter.js b/modules/adfBidAdapter.js
index 0b9c72a2cee..e21c4219baf 100644
--- a/modules/adfBidAdapter.js
+++ b/modules/adfBidAdapter.js
@@ -232,9 +232,6 @@ export const spec = {
       method: 'POST',
       url: 'https://' + adxDomain + '/adx/openrtb',
       data: JSON.stringify(request),
-      options: {
-        contentType: 'application/json'
-      },
       bids: validBidRequests
     };
   },
diff --git a/test/spec/modules/adfBidAdapter_spec.js b/test/spec/modules/adfBidAdapter_spec.js
index 25f7fda4419..4317fd3258b 100644
--- a/test/spec/modules/adfBidAdapter_spec.js
+++ b/test/spec/modules/adfBidAdapter_spec.js
@@ -75,7 +75,7 @@ describe('Adf adapter', function () {
 
       assert.equal(request.method, 'POST');
       assert.equal(request.url, 'https://10.8.57.207/adx/openrtb');
-      assert.deepEqual(request.options, {contentType: 'application/json'});
+      assert.equal(request.options, undefined);
       assert.ok(request.data);
     });