diff --git a/modules/yieldmoBidAdapter.js b/modules/yieldmoBidAdapter.js
index c1151617ac4..93ab8b132ea 100644
--- a/modules/yieldmoBidAdapter.js
+++ b/modules/yieldmoBidAdapter.js
@@ -89,7 +89,7 @@ export const spec = {
       });
       serverRequest.p = '[' + serverRequest.p.toString() + ']';
       serverRequests.push({
-        method: 'GET',
+        method: 'POST',
         url: BANNER_SERVER_ENDPOINT,
         data: serverRequest
       });
diff --git a/test/spec/modules/yieldmoBidAdapter_spec.js b/test/spec/modules/yieldmoBidAdapter_spec.js
index deabef69093..72e7b98e830 100644
--- a/test/spec/modules/yieldmoBidAdapter_spec.js
+++ b/test/spec/modules/yieldmoBidAdapter_spec.js
@@ -153,10 +153,10 @@ describe('YieldmoAdapter', function () {
       utils.deepAccess(build(bidRequests, bidderReq), `${index}.data`) || {};
 
     describe('Banner:', function () {
-      it('should attempt to send banner bid requests to the endpoint via GET', function () {
+      it('should attempt to send banner bid requests to the endpoint via POST', function () {
         const requests = build([mockBannerBid()]);
         expect(requests.length).to.equal(1);
-        expect(requests[0].method).to.equal('GET');
+        expect(requests[0].method).to.equal('POST');
         expect(requests[0].url).to.be.equal(BANNER_ENDPOINT);
       });