diff --git a/modules/insticatorBidAdapter.js b/modules/insticatorBidAdapter.js
index a081873e78c..47a3353a897 100644
--- a/modules/insticatorBidAdapter.js
+++ b/modules/insticatorBidAdapter.js
@@ -7,6 +7,7 @@ import {
   logError,
 } from '../src/utils.js';
 import { getStorageManager } from '../src/storageManager.js';
+import find from 'core-js-pure/features/array/find.js';
 
 const BIDDER_CODE = 'insticator';
 const ENDPOINT = 'https://ex.ingage.tech/v1/openrtb'; // production endpoint
@@ -151,7 +152,7 @@ function buildRequest(validBidRequests, bidderRequest) {
 }
 
 function buildBid(bid, bidderRequest) {
-  const originalBid = bidderRequest.bids.find((b) => b.bidId === bid.impid);
+  const originalBid = find(bidderRequest.bids, (b) => b.bidId === bid.impid);
 
   return {
     requestId: bid.impid,
diff --git a/modules/sharethroughBidAdapter.js b/modules/sharethroughBidAdapter.js
index 24ab2530014..3b4f0ec2a4e 100644
--- a/modules/sharethroughBidAdapter.js
+++ b/modules/sharethroughBidAdapter.js
@@ -3,6 +3,7 @@ import * as utils from '../src/utils.js';
 import { config } from '../src/config.js';
 import { BANNER, VIDEO } from '../src/mediaTypes.js';
 import { createEidsArray } from './userId/eids.js';
+import find from 'core-js-pure/features/array/find.js';
 
 const VERSION = '4.0.0';
 const BIDDER_CODE = 'sharethrough';
@@ -270,7 +271,7 @@ function getProtocol() {
 }
 
 function matchRequest(id, request) {
-  return request.bidRequests.find(bid => bid.bidId === id);
+  return find(request.bidRequests, bid => bid.bidId === id);
 }
 
 // stub for ?? operator
diff --git a/modules/timeoutRtdProvider.js b/modules/timeoutRtdProvider.js
index 020a7d6f7f0..8f68cf1bcc5 100644
--- a/modules/timeoutRtdProvider.js
+++ b/modules/timeoutRtdProvider.js
@@ -15,6 +15,14 @@ export const timeoutRtdFunctions = {
   handleTimeoutIncrement
 };
 
+const entries = Object.entries || function(obj) {
+  const ownProps = Object.keys(obj);
+  let i = ownProps.length;
+  let resArray = new Array(i);
+  while (i--) { resArray[i] = [ownProps[i], obj[ownProps[i]]]; }
+  return resArray;
+};
+
 function getDeviceType() {
   const userAgent = window.navigator.userAgent.toLowerCase();
   if ((/ipad|android 3.0|xoom|sch-i800|playbook|tablet|kindle/i.test(userAgent))) {
@@ -78,7 +86,7 @@ function calculateTimeoutModifier(adUnits, rules) {
     if (rules.numAdUnits[numAdUnits]) {
       timeoutModifier += rules.numAdUnits[numAdUnits];
     } else {
-      for (const [rangeStr, timeoutVal] of Object.entries(rules.numAdUnits)) {
+      for (const [rangeStr, timeoutVal] of entries(rules.numAdUnits)) {
         const [lowerBound, upperBound] = rangeStr.split('-');
         if (parseInt(lowerBound) <= numAdUnits && numAdUnits <= parseInt(upperBound)) {
           utils.logInfo(`Adding ${timeoutVal} to timeout for numAdUnits ${numAdUnits}`)