diff --git a/modules/gumgumBidAdapter.js b/modules/gumgumBidAdapter.js
index 7f8627ec5f7..60851d2b4dd 100644
--- a/modules/gumgumBidAdapter.js
+++ b/modules/gumgumBidAdapter.js
@@ -318,7 +318,8 @@ function buildRequests(validBidRequests, bidderRequest) {
     const gpid = deepAccess(ortb2Imp, 'ext.data.pbadslot') || deepAccess(ortb2Imp, 'ext.data.adserver.adslot');
     let sizes = [1, 1];
     let data = {};
-
+    data.displaymanager = 'Prebid.js - gumgum';
+    data.displaymanagerver = '$prebid.version$';
     const date = new Date();
     const lt = date.getTime();
     const to = date.getTimezoneOffset();
diff --git a/test/spec/modules/gumgumBidAdapter_spec.js b/test/spec/modules/gumgumBidAdapter_spec.js
index 52cfd0294e7..29e372d0f87 100644
--- a/test/spec/modules/gumgumBidAdapter_spec.js
+++ b/test/spec/modules/gumgumBidAdapter_spec.js
@@ -192,6 +192,8 @@ describe('gumgumAdapter', function () {
       const request = { ...bidRequests[0] };
       const bidRequest = spec.buildRequests([request])[0];
       expect(bidRequest.data.aun).to.equal(bidRequests[0].adUnitCode);
+      expect(bidRequest.data.displaymanager).to.equal('Prebid.js - gumgum');
+      expect(bidRequest.data.displaymanagerver).to.equal(JCSI.pbv);
     });
     it('should set pubProvidedId if the uid and  pubProvidedId are available', function () {
       const request = { ...bidRequests[0] };