diff --git a/modules/ironsourceBidAdapter.js b/modules/ironsourceBidAdapter.js
index ba510e86e7f..5b8531d7a85 100644
--- a/modules/ironsourceBidAdapter.js
+++ b/modules/ironsourceBidAdapter.js
@@ -211,7 +211,8 @@ function generateParameters(bid, bidderRequest) {
     bid_id: utils.getBidIdParameter('bidId', bid),
     bidder_request_id: utils.getBidIdParameter('bidderRequestId', bid),
     transaction_id: utils.getBidIdParameter('transactionId', bid),
-    session_id: utils.getBidIdParameter('auctionId', bid),
+    session_id: params.sessionId || utils.getBidIdParameter('auctionId', bid),
+    is_wrapper: !!params.isWrapper,
     publisher_name: domain,
     site_domain: domain,
     bidder_version: BIDDER_VERSION
diff --git a/test/spec/modules/ironsourceBidAdapter_spec.js b/test/spec/modules/ironsourceBidAdapter_spec.js
index 93c3a6fb7b9..cca928ff28b 100644
--- a/test/spec/modules/ironsourceBidAdapter_spec.js
+++ b/test/spec/modules/ironsourceBidAdapter_spec.js
@@ -75,6 +75,8 @@ describe('ironsourceAdapter', function () {
       bidderCode: 'ironsource',
     }
 
+    const customSessionId = '12345678';
+
     it('sends bid request to ENDPOINT via GET', function () {
       const requests = spec.buildRequests(bidRequests, bidderRequest);
       for (const request of requests) {
@@ -98,6 +100,22 @@ describe('ironsourceAdapter', function () {
       }
     });
 
+    it('sends the is_wrapper query param', function () {
+      bidRequests[0].params.isWrapper = true;
+      const requests = spec.buildRequests(bidRequests, bidderRequest);
+      for (const request of requests) {
+        expect(request.data.is_wrapper).to.equal(true);
+      }
+    });
+
+    it('sends the custom session id as a query param', function () {
+      bidRequests[0].params.sessionId = customSessionId;
+      const requests = spec.buildRequests(bidRequests, bidderRequest);
+      for (const request of requests) {
+        expect(request.data.session_id).to.equal(customSessionId);
+      }
+    });
+
     it('should send the correct width and height', function () {
       const requests = spec.buildRequests(bidRequests, bidderRequest);
       for (const request of requests) {