diff --git a/modules/freewheelSSPBidAdapter.js b/modules/freewheelSSPBidAdapter.js
index 7c696c746e67..64ebb36478bc 100644
--- a/modules/freewheelSSPBidAdapter.js
+++ b/modules/freewheelSSPBidAdapter.js
@@ -47,7 +47,9 @@ function getPricing(xmlNode) {
   var princingData = {};
 
   var extensions = xmlNode.querySelectorAll('Extension');
-  extensions.forEach(function(node) {
+  // Nodelist.forEach is not supported in IE and Edge
+  // Workaround given here https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/10638731/
+  Array.prototype.forEach.call(extensions, function(node) {
     if (node.getAttribute('type') === 'StickyPricing') {
       pricingExtNode = node;
     }
@@ -69,8 +71,9 @@ function getPricing(xmlNode) {
 function getCreativeId(xmlNode) {
   var creaId = '';
   var adNodes = xmlNode.querySelectorAll('Ad');
-
-  adNodes.forEach(function(el) {
+  // Nodelist.forEach is not supported in IE and Edge
+  // Workaround given here https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/10638731/
+  Array.prototype.forEach.call(adNodes, function(el) {
     creaId += '[' + el.getAttribute('id') + ']';
   });
 
diff --git a/modules/rxrtbBidAdapter.js b/modules/rxrtbBidAdapter.js
index cf03e41c208c..55b6991667af 100644
--- a/modules/rxrtbBidAdapter.js
+++ b/modules/rxrtbBidAdapter.js
@@ -12,7 +12,7 @@ export const spec = {
   code: BIDDER_CODE,
   supportedMediaTypes: [BANNER],
   isBidRequestValid: function (bidRequest) {
-    return 'params' in bidRequest && bidRequest.params.source !== undefined && bidRequest.params.id !== undefined && Number.isInteger(bidRequest.params.id) && bidRequest.params.token !== undefined;
+    return 'params' in bidRequest && bidRequest.params.source !== undefined && bidRequest.params.id !== undefined && utils.isInteger(bidRequest.params.id) && bidRequest.params.token !== undefined;
   },
   buildRequests: function (validBidRequests) {
     var requests = [];
@@ -100,7 +100,7 @@ function makeImp(req) {
     'banner': makeBanner(req)
   };
 
-  if (req.params.bidfloor && Number.isInteger(req.params.bidfloor)) {
+  if (req.params.bidfloor && utils.isInteger(req.params.bidfloor)) {
     imp.bidfloor = req.params.bidfloor
   }
 
@@ -117,7 +117,7 @@ function makeBanner(req) {
     });
   }
   banner.format = format;
-  if (req.params.pos && Number.isInteger(req.params.pos)) {
+  if (req.params.pos && utils.isInteger(req.params.pos)) {
     banner.pos = req.params.pos;
   }
   return banner;
diff --git a/modules/serverbidServerBidAdapter.js b/modules/serverbidServerBidAdapter.js
index 4ff8992772f6..4be96a09bd6d 100644
--- a/modules/serverbidServerBidAdapter.js
+++ b/modules/serverbidServerBidAdapter.js
@@ -139,12 +139,12 @@ ServerBidServerAdapter = function ServerBidServerAdapter() {
         }
       }
       if (data.placements.length) {
-        ajax(BASE_URI, _responseCallback(addBidResponse, bids), JSON.stringify(data), { method: 'POST', withCredentials: true, contentType: 'application/json' });
+        ajax(BASE_URI, _responseCallback(addBidResponse, bids, done), JSON.stringify(data), { method: 'POST', withCredentials: true, contentType: 'application/json' });
       }
     }
   }
 
-  function _responseCallback(addBidResponse, bids) {
+  function _responseCallback(addBidResponse, bids, done) {
     return function (resp) {
       let bid;
       let bidId;
diff --git a/src/utils.js b/src/utils.js
index 19014049352a..2d185ebe4c65 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -866,3 +866,16 @@ export function deletePropertyFromObject(object, prop) {
 export function removeRequestId(bid) {
   return exports.deletePropertyFromObject(bid, 'requestId');
 }
+
+/**
+ * Checks input is integer or not
+ * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isInteger
+ * @param {*} value
+ */
+export function isInteger(value) {
+  if (Number.isInteger) {
+    return Number.isInteger(value);
+  } else {
+    return typeof value === 'number' && isFinite(value) && Math.floor(value) === value;
+  }
+}