diff --git a/package-lock.json b/package-lock.json
index 3387d2ff6..6ae09e4a4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -582,9 +582,9 @@
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@@ -4650,6 +4687,11 @@
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@@ -6584,11 +6643,6 @@
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-    "pn": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/pn/-/pn-1.1.0.tgz",
-      "integrity": "sha512-2qHaIQr2VLRFoxe2nASzsV6ef4yOOH+Fi9FBOVH6cqeSgUnoyySPZkxzLuzd+RYOQTRpROA0ztTMqxROKSb/nA=="
-    },
     "posix-character-classes": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/posix-character-classes/-/posix-character-classes-0.1.1.tgz",
@@ -7017,19 +7071,19 @@
       }
     },
     "request-promise-core": {
-      "version": "1.1.3",
-      "resolved": "https://registry.npmjs.org/request-promise-core/-/request-promise-core-1.1.3.tgz",
-      "integrity": "sha512-QIs2+ArIGQVp5ZYbWD5ZLCY29D5CfWizP8eWnm8FoGD1TX61veauETVQbrV60662V0oFBkrDOuaBI8XgtuyYAQ==",
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/request-promise-core/-/request-promise-core-1.1.4.tgz",
+      "integrity": "sha512-TTbAfBBRdWD7aNNOoVOBH4pN/KigV6LyapYNNlAPA8JwbovRti1E88m3sYAwsLi5ryhPKsE9APwnjFTgdUjTpw==",
       "requires": {
-        "lodash": "^4.17.15"
+        "lodash": "^4.17.19"
       }
     },
     "request-promise-native": {
-      "version": "1.0.8",
-      "resolved": "https://registry.npmjs.org/request-promise-native/-/request-promise-native-1.0.8.tgz",
-      "integrity": "sha512-dapwLGqkHtwL5AEbfenuzjTYg35Jd6KPytsC2/TLkVMz8rm+tNt72MGUWT1RP/aYawMpN6HqbNGBQaRcBtjQMQ==",
+      "version": "1.0.9",
+      "resolved": "https://registry.npmjs.org/request-promise-native/-/request-promise-native-1.0.9.tgz",
+      "integrity": "sha512-wcW+sIUiWnKgNY0dqCpOZkUbF/I+YPi+f09JZIDa39Ec+q82CpSYniDp+ISgTTbKmnpJWASeJBPZmoxH84wt3g==",
       "requires": {
-        "request-promise-core": "1.1.3",
+        "request-promise-core": "1.1.4",
         "stealthy-require": "^1.1.1",
         "tough-cookie": "^2.3.3"
       },
@@ -7186,11 +7240,11 @@
       "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg=="
     },
     "saxes": {
-      "version": "3.1.11",
-      "resolved": "https://registry.npmjs.org/saxes/-/saxes-3.1.11.tgz",
-      "integrity": "sha512-Ydydq3zC+WYDJK1+gRxRapLIED9PWeSuuS41wqyoRmzvhhh9nc+QQrVMKJYzJFULazeGhzSV0QleN2wD3boh2g==",
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/saxes/-/saxes-5.0.1.tgz",
+      "integrity": "sha512-5LBh1Tls8c9xgGjw3QrMwETmTMVk0oFgvrFSvWx62llR2hcEInrKNZ2GZCCuuy2lvWrdl5jhbpeqc5hRYKFOcw==",
       "requires": {
-        "xmlchars": "^2.1.1"
+        "xmlchars": "^2.2.0"
       }
     },
     "selenium-standalone": {
@@ -8273,11 +8327,11 @@
       }
     },
     "tr46": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/tr46/-/tr46-1.0.1.tgz",
-      "integrity": "sha1-qLE/1r/SSJUZZ0zN5VujaTtwbQk=",
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-2.0.2.tgz",
+      "integrity": "sha512-3n1qG+/5kg+jrbTzwAykB5yRYtQCTqOGKq5U5PE3b0a1/mzo6snDhjGS0zJVJunO0NrT3Dg1MLy5TjWP/UJppg==",
       "requires": {
-        "punycode": "^2.1.0"
+        "punycode": "^2.1.1"
       }
     },
     "tree-kill": {
@@ -8337,6 +8391,11 @@
       "integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c=",
       "dev": true
     },
+    "typescript": {
+      "version": "4.1.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.1.3.tgz",
+      "integrity": "sha512-B3ZIOf1IKeH2ixgHhj6la6xdwR9QrLC5d1VKeCSY4tvkqhF2eqd9O7txNlS0PO3GrBAFIdr3L1ndNwteUbZLYg=="
+    },
     "typescript-closure-tools": {
       "version": "0.0.7",
       "resolved": "https://registry.npmjs.org/typescript-closure-tools/-/typescript-closure-tools-0.0.7.tgz",
@@ -8671,12 +8730,10 @@
       }
     },
     "w3c-xmlserializer": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-1.1.2.tgz",
-      "integrity": "sha512-p10l/ayESzrBMYWRID6xbuCKh2Fp77+sA0doRuGn4tTIMrrZVeqfpKjXHY+oDh3K4nLdPgNwMTVP6Vp4pvqbNg==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-2.0.0.tgz",
+      "integrity": "sha512-4tzD0mF8iSiMiNs30BiLO3EpfGLZUT2MSX/G+o7ZywDzliWQ3OPtTZ0PTC3B3ca1UAf4cJMHB+2Bf56EriJuRA==",
       "requires": {
-        "domexception": "^1.0.1",
-        "webidl-conversions": "^4.0.2",
         "xml-name-validator": "^3.0.0"
       }
     },
@@ -8843,9 +8900,9 @@
       }
     },
     "webidl-conversions": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
-      "integrity": "sha512-YQ+BmxuTgd6UXZW3+ICGfyqRyHXVlD5GtQr5+qjiNW7bF0cqrzX500HVXPBOvgXb5YnzDd+h0zqyv61KUD7+Sg=="
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-6.1.0.tgz",
+      "integrity": "sha512-qBIvFLGiBpLjfwmYAaHPXsn+ho5xZnGvyGvsarywGNc8VyQJUMHJ8OBKGGrPER0okBeMDaan4mNBlgBROxuI8w=="
     },
     "whatwg-encoding": {
       "version": "1.0.5",
@@ -8861,13 +8918,13 @@
       "integrity": "sha512-M4yMwr6mAnQz76TbJm914+gPpB/nCwvZbJU28cUD6dR004SAxDLOOSUaB1JDRqLtaOV/vi0IC5lEAGFgrjGv/g=="
     },
     "whatwg-url": {
-      "version": "7.1.0",
-      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-7.1.0.tgz",
-      "integrity": "sha512-WUu7Rg1DroM7oQvGWfOiAK21n74Gg+T4elXEQYkOhtyLeWiJFoOGLXPKI/9gzIie9CtwVLm8wtw6YJdKyxSjeg==",
+      "version": "8.4.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-8.4.0.tgz",
+      "integrity": "sha512-vwTUFf6V4zhcPkWp/4CQPr1TW9Ml6SF4lVyaIMBdJw5i6qUUJ1QWM4Z6YYVkfka0OUIzVo/0aNtGVGk256IKWw==",
       "requires": {
         "lodash.sortby": "^4.7.0",
-        "tr46": "^1.0.1",
-        "webidl-conversions": "^4.0.2"
+        "tr46": "^2.0.2",
+        "webidl-conversions": "^6.1.0"
       }
     },
     "which": {
diff --git a/package.json b/package.json
index 774163a2f..53cb55754 100644
--- a/package.json
+++ b/package.json
@@ -87,6 +87,7 @@
     "yargs": "^16.0.3"
   },
   "dependencies": {
-    "jsdom": "15.2.1"
+    "jsdom": "16.4.0",
+    "typescript": "^4.1.3"
   }
 }
diff --git a/scripts/package/node/core.js b/scripts/package/node/core.js
index 8f7745304..70e1f9078 100644
--- a/scripts/package/node/core.js
+++ b/scripts/package/node/core.js
@@ -23,8 +23,10 @@ Blockly.setLocale = function (locale) {
 // Override textToDomDocument and provide Node.js alternatives to DOMParser and
 // XMLSerializer.
 if (typeof Blockly.utils.global.document !== 'object') {
-  Blockly.utils.global.DOMParser = require("jsdom/lib/jsdom/living").DOMParser;
-  Blockly.utils.global.XMLSerializer = require("jsdom/lib/jsdom/living").XMLSerializer;
+  var JSDOM = require('jsdom').JSDOM;
+  var dom = new JSDOM();
+  Blockly.utils.global.DOMParser = dom.window.DOMParser;
+  Blockly.utils.global.XMLSerializer = dom.window.XMLSerializer;
   var doc = Blockly.utils.xml.textToDomDocument(
     '<xml xmlns="https://developers.google.com/blockly/xml"></xml>');
   Blockly.utils.xml.document = function() {