diff --git a/samples/react-kanban-board/package-lock.json b/samples/react-kanban-board/package-lock.json
index b5f266c18..77c132925 100644
--- a/samples/react-kanban-board/package-lock.json
+++ b/samples/react-kanban-board/package-lock.json
@@ -2036,6 +2036,66 @@
         "tslib": "1.9.3"
       }
     },
+    "@pnp/polyfill-ie11": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@pnp/polyfill-ie11/-/polyfill-ie11-2.0.2.tgz",
+      "integrity": "sha512-oun6gIPflZL36bmkJHYQkh6s45Y6vYgHSAqQJ+nfITgKwfIytisaOEK+tn6kV8RhL6t42O1PXWw4P60ximIeOA==",
+      "requires": {
+        "@pnp/sp": "^2.0.0",
+        "core-js": "3.6.5",
+        "es6-map": "0.1.5",
+        "whatwg-fetch": "3.0.0"
+      },
+      "dependencies": {
+        "@pnp/common": {
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/@pnp/common/-/common-2.0.5.tgz",
+          "integrity": "sha512-swL2CBaqTHkk3JuB+WaHa3MEoRDV+JLyY5r6P6vtqiLnlYypb5ZWYgneRkq82SeJnbKP/xyMiCyhLd52KpY6Rg==",
+          "requires": {
+            "tslib": "1.10.0"
+          }
+        },
+        "@pnp/logging": {
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/@pnp/logging/-/logging-2.0.5.tgz",
+          "integrity": "sha512-vFuZwR4sPUcvTD/HolQvYLsaD9aO7w1mcQNKvPabG7ncYxEkI47cFnrgxxyqI2VjmyFVRvHfJTq0w6aFHeBFpQ==",
+          "requires": {
+            "tslib": "1.10.0"
+          }
+        },
+        "@pnp/odata": {
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/@pnp/odata/-/odata-2.0.5.tgz",
+          "integrity": "sha512-tB1Blv44T3TEhM7ZSL9MgOLkv7GFQmaYgNj3bcNcBYpLxtux6A83TU8vUAS9vz25rnNrCXxKZGmmXeACyOO6pQ==",
+          "requires": {
+            "@pnp/common": "2.0.5",
+            "@pnp/logging": "2.0.5",
+            "tslib": "1.10.0"
+          }
+        },
+        "@pnp/sp": {
+          "version": "2.0.5",
+          "resolved": "https://registry.npmjs.org/@pnp/sp/-/sp-2.0.5.tgz",
+          "integrity": "sha512-i+JN/hDJY8Da1w0Zsb1lfbtl7iwmlvYD6YLdIMkmCKpsc6UmuVkYDZsDUApz5MEuIGYt497rStL7MtfnlSqGRQ==",
+          "requires": {
+            "@pnp/common": "2.0.5",
+            "@pnp/logging": "2.0.5",
+            "@pnp/odata": "2.0.5",
+            "tslib": "1.10.0"
+          }
+        },
+        "core-js": {
+          "version": "3.6.5",
+          "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.6.5.tgz",
+          "integrity": "sha512-vZVEEwZoIsI+vPEuoF9Iqf5H7/M3eeQqWlQnYa8FSKKePuYTf5MWnxb5SDAzCa60b3JBRS5g9b+Dq7b1y/RCrA=="
+        },
+        "tslib": {
+          "version": "1.10.0",
+          "resolved": "https://registry.npmjs.org/tslib/-/tslib-1.10.0.tgz",
+          "integrity": "sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ=="
+        }
+      }
+    },
     "@pnp/sp": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/@pnp/sp/-/sp-1.3.3.tgz",
@@ -4989,7 +5049,6 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/d/-/d-1.0.1.tgz",
       "integrity": "sha512-m62ShEObQ39CfralilEQRjH6oAMtNCV1xJyEx5LpRYUVN+EviphDgUc/F3hnYbADmkiNs67Y+3ylmlG7Lnu+FA==",
-      "dev": true,
       "requires": {
         "es5-ext": "^0.10.50",
         "type": "^1.0.1"
@@ -5560,7 +5619,6 @@
       "version": "0.10.50",
       "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.50.tgz",
       "integrity": "sha512-KMzZTPBkeQV/JcSQhI5/z6d9VWJ3EnQ194USTUwIYZ2ZbpN8+SGXQKt1h68EX44+qt+Fzr8DO17vnxrw7c3agw==",
-      "dev": true,
       "requires": {
         "es6-iterator": "~2.0.3",
         "es6-symbol": "~3.1.1",
@@ -5576,7 +5634,6 @@
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       "integrity": "sha1-p96IkUGgWpSwhUQDstCg+/qY87c=",
-      "dev": true,
       "requires": {
         "d": "1",
         "es5-ext": "^0.10.35",
@@ -5587,7 +5644,6 @@
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       "resolved": "https://registry.npmjs.org/es6-map/-/es6-map-0.1.5.tgz",
       "integrity": "sha1-kTbgUD3MBqMBaQ8LsU/042TpSfA=",
-      "dev": true,
       "requires": {
         "d": "1",
         "es5-ext": "~0.10.14",
@@ -5615,7 +5671,6 @@
       "version": "0.1.5",
       "resolved": "https://registry.npmjs.org/es6-set/-/es6-set-0.1.5.tgz",
       "integrity": "sha1-0rPsXU2ADO2BjbU40ol02wpzzLE=",
-      "dev": true,
       "requires": {
         "d": "1",
         "es5-ext": "~0.10.14",
@@ -5628,7 +5683,6 @@
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/es6-symbol/-/es6-symbol-3.1.1.tgz",
       "integrity": "sha1-vwDvT9q2uhtG7Le2KbTH7VcVzHc=",
-      "dev": true,
       "requires": {
         "d": "1",
         "es5-ext": "~0.10.14"
@@ -5738,7 +5792,6 @@
       "version": "0.3.5",
       "resolved": "https://registry.npmjs.org/event-emitter/-/event-emitter-0.3.5.tgz",
       "integrity": "sha1-34xp7vFkeSPHFXuc6DhAYQsCzDk=",
-      "dev": true,
       "requires": {
         "d": "1",
         "es5-ext": "~0.10.14"
@@ -11160,8 +11213,7 @@
     "next-tick": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/next-tick/-/next-tick-1.0.0.tgz",
-      "integrity": "sha1-yobR/ogoFpsBICCOPchCS524NCw=",
-      "dev": true
+      "integrity": "sha1-yobR/ogoFpsBICCOPchCS524NCw="
     },
     "no-case": {
       "version": "2.3.2",
@@ -16517,8 +16569,7 @@
     "type": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/type/-/type-1.0.1.tgz",
-      "integrity": "sha512-MAM5dBMJCJNKs9E7JXo4CXRAansRfG0nlJxW7Wf6GZzSOvH31zClSaHdIMWLehe/EGMBkqeC55rrkaOr5Oo7Nw==",
-      "dev": true
+      "integrity": "sha512-MAM5dBMJCJNKs9E7JXo4CXRAansRfG0nlJxW7Wf6GZzSOvH31zClSaHdIMWLehe/EGMBkqeC55rrkaOr5Oo7Nw=="
     },
     "type-check": {
       "version": "0.3.2",
diff --git a/samples/react-kanban-board/package.json b/samples/react-kanban-board/package.json
index 524e7913d..a825abd18 100644
--- a/samples/react-kanban-board/package.json
+++ b/samples/react-kanban-board/package.json
@@ -19,6 +19,7 @@
     "@pnp/common": "^1.3.3",
     "@pnp/logging": "^1.3.3",
     "@pnp/odata": "^1.3.3",
+    "@pnp/polyfill-ie11": "^2.0.2",
     "@pnp/sp": "^1.3.3",
     "@types/es6-promise": "0.0.33",
     "@types/react": "16.7.22",
diff --git a/samples/react-kanban-board/src/webparts/kanbanBoard/KanbanBoardWebPart.ts b/samples/react-kanban-board/src/webparts/kanbanBoard/KanbanBoardWebPart.ts
index 3ff622969..407795220 100644
--- a/samples/react-kanban-board/src/webparts/kanbanBoard/KanbanBoardWebPart.ts
+++ b/samples/react-kanban-board/src/webparts/kanbanBoard/KanbanBoardWebPart.ts
@@ -6,11 +6,13 @@ import {
   IPropertyPaneConfiguration,
   PropertyPaneTextField
 } from '@microsoft/sp-property-pane';
-import {sp} from '@pnp/sp';
+
 
 import * as strings from 'KanbanBoardWebPartStrings';
 import KanbanBoard from './components/KanbanBoard';
 import { IKanbanBoardProps } from './components/IKanbanBoardProps';
+import "@pnp/polyfill-ie11";
+import {sp} from '@pnp/sp';
 
 export interface IKanbanBoardWebPartProps {
   listTitle: string;