diff --git a/.github/workflows/CI-CD.yaml b/.github/workflows/CI-CD.yaml
index 154c5c6a..1308c7f4 100644
--- a/.github/workflows/CI-CD.yaml
+++ b/.github/workflows/CI-CD.yaml
@@ -25,7 +25,7 @@ jobs:
           - macos-latest
           - windows-latest
         node:
-          - 14
+          - 17
           - lts/*
           - current
 
diff --git a/karma.conf.js b/karma.conf.js
index 39101073..0e3ee806 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -4,18 +4,70 @@
 
 "use strict";
 
-const { karmaConfig } = require("@jsdevtools/karma-config");
+const nodeUtil = require("util");
+const { buildConfig } = require("@jsdevtools/karma-config");
 const { host } = require("@jsdevtools/host-environment");
 
-module.exports = karmaConfig({
-  sourceDir: "lib",
-  fixtures: "test/fixtures/**/*.js",
-  browsers: {
-    chrome: host.ci ? host.os.linux : true,
-    firefox: host.ci ? host.os.linux : true,
-    // TODO these were disabled as unstable. should we remove saucelabs or what?
-    // safari: host.ci ? host.os.linux : host.os.mac,    // SauceLabs in CI
-    edge: host.ci ? host.os.linux : host.os.windows,  // SauceLabs in CI
-    // ie: host.ci ? host.os.windows : false,  // IE needs to run by itself, due to Babel transforms
-  },
-});
+module.exports = (karma) => {
+
+  const browsers = [];
+  const CI = isCI();
+  browsers.push(CI ? "ChromeHeadless" : "Chrome");
+  browsers.push(CI ? "FirefoxHeadless" : "Firefox");
+  host.os.mac && browsers.push("Safari");
+  host.os.windows && browsers.push("Edge");
+
+  const plugins = [
+    require("@jsdevtools/karma-host-environment"),
+    require("karma-verbose-reporter"),
+    require("karma-mocha"),
+    require("karma-webpack"), 
+  ]
+  plugins.push(require("karma-chrome-launcher"))
+  plugins.push(require("karma-firefox-launcher"))
+  host.os.mac && plugins.push(require("karma-safari-launcher"))
+  host.os.windows && plugins.push(require("@chiragrupani/karma-chromium-edge-launcher"))
+  plugins.push(require("karma-coverage-istanbul-reporter"))
+  
+  const config = buildConfig({
+    sourceDir: "lib",
+    fixtures: "test/fixtures/**/*.js",
+    browsers: {
+      chrome: true,
+      firefox: true,
+      safari: host.os.mac,
+      edge: host.os.windows,
+      ie: false
+    },
+    config: {
+      browsers: browsers,
+      plugins: plugins
+    }
+  });
+
+  if (config.logLevel !== karma.LOG_DISABLE) {
+    console.debug("Karma Config:\n", nodeUtil.inspect(config, {
+      depth: 10,
+      colors: true,
+      compact: false,
+    }));
+  }
+
+  karma.set(config);
+};
+
+function isCI() {
+  let CI = environmentFlag("CI");
+  let karmaCI = environmentFlag("KARMA_CI");
+
+  return Boolean(CI || karmaCI || host.ci);
+};
+
+function environmentFlag(name) {
+  let value = environmentVariable(name);
+  return !["", "false", "off", "no"].includes(value);
+}
+
+function environmentVariable(name) {
+  return (process.env[name] || "").trim().toLowerCase();
+}
diff --git a/lib/refs.js b/lib/refs.js
index 82e37841..3dfb2fd5 100644
--- a/lib/refs.js
+++ b/lib/refs.js
@@ -4,7 +4,7 @@ const { ono } = require("@jsdevtools/ono");
 const $Ref = require("./ref");
 const url = require("./util/url");
 
-const isWindows = /^win/.test(globalThis.process?.platform);
+const isWindows = /^win/.test(globalThis.process ? globalThis.process.platform : undefined);
 const getPathFromOs = filePath => isWindows ? filePath.replace(/\\/g, "/") : filePath;
 
 module.exports = $Refs;
diff --git a/lib/resolvers/http.js b/lib/resolvers/http.js
index 7e5f10d8..6190c493 100644
--- a/lib/resolvers/http.js
+++ b/lib/resolvers/http.js
@@ -68,7 +68,7 @@ module.exports = {
    * @param {object} file           - An object containing information about the referenced file
    * @param {string} file.url       - The full URL of the referenced file
    * @param {string} file.extension - The lowercased file extension (e.g. ".txt", ".html", etc.)
-   * @returns {Promise<string>}
+   * @returns {Promise<Buffer>}
    */
   read (file) {
     let u = url.parse(file.url);
@@ -89,7 +89,7 @@ module.exports = {
  * @param {object} httpOptions  - The `options.resolve.http` object
  * @param {number} [redirects]  - The redirect URLs that have already been followed
  *
- * @returns {Promise<string>}
+ * @returns {Promise<Buffer>}
  * The promise resolves with the raw downloaded data, or rejects if there is an HTTP error.
  */
 function download (u, httpOptions, redirects) {
@@ -99,25 +99,25 @@ function download (u, httpOptions, redirects) {
 
   return get(u, httpOptions)
     .then((res) => {
-      if (res.statusCode >= 400) {
-        throw ono({ status: res.statusCode }, `HTTP ERROR ${res.statusCode}`);
+      if (res.status >= 400) {
+        throw ono({ status: res.statusCode }, `HTTP ERROR ${res.status}`);
       }
-      else if (res.statusCode >= 300) {
+      else if (res.status >= 300) {
         if (redirects.length > httpOptions.redirects) {
-          throw new ResolverError(ono({ status: res.statusCode },
+          throw new ResolverError(ono({ status: res.status },
             `Error downloading ${redirects[0]}. \nToo many redirects: \n  ${redirects.join(" \n  ")}`));
         }
         else if (!res.headers.location) {
-          throw ono({ status: res.statusCode }, `HTTP ${res.statusCode} redirect with no location header`);
+          throw ono({ status: res.status }, `HTTP ${res.status} redirect with no location header`);
         }
         else {
-          // console.log('HTTP %d redirect %s -> %s', res.statusCode, u.href, res.headers.location);
+          // console.log('HTTP %d redirect %s -> %s', res.status, u.href, res.headers.location);
           let redirectTo = url.resolve(u, res.headers.location);
           return download(redirectTo, httpOptions, redirects);
         }
       }
       else {
-        return res.text();
+        return res.body ? res.arrayBuffer().then(buf => Buffer.from(buf)) : Buffer.alloc(0);
       }
     })
     .catch((err) => {
diff --git a/lib/util/url.js b/lib/util/url.js
index 20d9621e..def1eb84 100644
--- a/lib/util/url.js
+++ b/lib/util/url.js
@@ -3,7 +3,7 @@
 const nodePath = require("path");
 const projectDir = nodePath.resolve(__dirname, "..", "..");
 
-let isWindows = /^win/.test(globalThis.process?.platform),
+let isWindows = /^win/.test(globalThis.process ? globalThis.process.platform : undefined),
     forwardSlashPattern = /\//g,
     protocolPattern = /^(\w{2,}):\/\//i,
     url = module.exports,
diff --git a/package-lock.json b/package-lock.json
index abaa66b7..cae44d9d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,18 +16,21 @@
       },
       "devDependencies": {
         "@babel/polyfill": "^7.12.1",
+        "@chiragrupani/karma-chromium-edge-launcher": "^2.2.2",
         "@jsdevtools/eslint-config": "^1.0.7",
         "@jsdevtools/host-environment": "^2.1.2",
         "@jsdevtools/karma-config": "^3.1.7",
         "@types/node": "^14.14.21",
         "chai": "^4.2.0",
         "chai-subset": "^1.6.0",
+        "chokidar": "^3.5.3",
+        "cross-env": "^7.0.3",
         "eslint": "^7.18.0",
+        "isomorphic-fetch": "^3.0.0",
         "karma": "^5.0.2",
         "karma-cli": "^2.0.0",
         "mocha": "^8.2.1",
         "node-abort-controller": "^3.0.1",
-        "node-fetch": "^3.2.10",
         "npm-check": "^5.9.0",
         "nyc": "^15.0.1",
         "semantic-release-plugin-update-version-in-files": "^1.1.0",
@@ -35,7 +38,10 @@
         "typescript": "^4.0.5"
       },
       "engines": {
-        "node": ">= 14"
+        "node": ">= 17"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/philsturgeon"
       }
     },
     "node_modules/@babel/code-frame": {
@@ -1054,6 +1060,12 @@
         "to-fast-properties": "^2.0.0"
       }
     },
+    "node_modules/@chiragrupani/karma-chromium-edge-launcher": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/@chiragrupani/karma-chromium-edge-launcher/-/karma-chromium-edge-launcher-2.2.2.tgz",
+      "integrity": "sha512-qbe3skHFAANtF/cQdMGVkdq1lZlVXsVuetx7p+RXhSrNiJ6UxRoB/rY0bbvChqSXTSJrWJ2tOjy+wvym+iYHHg==",
+      "dev": true
+    },
     "node_modules/@eslint/eslintrc": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/@eslint/eslintrc/-/eslintrc-0.3.0.tgz",
@@ -2012,9 +2024,9 @@
       }
     },
     "node_modules/anymatch": {
-      "version": "3.1.1",
-      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.1.tgz",
-      "integrity": "sha512-mM8522psRCqzV+6LhomX5wgp25YVibjh8Wj23I5RPkPppSVSjyKD2A2mBJmWGa+KN7f2D6LNh9jkBCeyLktzjg==",
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.3.tgz",
+      "integrity": "sha512-KMReFUr0B4t+D+OBkjR3KYqvocp2XaSzO55UcB6mgQMd3KbcE+mWTyvVV7D/zsdEbNnV6acZUutkiHQXvTr1Rw==",
       "dev": true,
       "dependencies": {
         "normalize-path": "^3.0.0",
@@ -3421,23 +3433,30 @@
       }
     },
     "node_modules/chokidar": {
-      "version": "3.4.1",
-      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.4.1.tgz",
-      "integrity": "sha512-TQTJyr2stihpC4Sya9hs2Xh+O2wf+igjL36Y75xx2WdHuiICcn/XJza46Jwt0eT5hVpQOzo3FpY3cj3RVYLX0g==",
+      "version": "3.5.3",
+      "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.3.tgz",
+      "integrity": "sha512-Dr3sfKRP6oTcjf2JmUmFJfeVMvXBdegxB0iVQ5eb2V10uFJUCAS8OByZdVAyVb8xXNz3GjjTgj9kLWsZTqE6kw==",
       "dev": true,
-      "optional": true,
+      "funding": [
+        {
+          "type": "individual",
+          "url": "https://paulmillr.com/funding/"
+        }
+      ],
       "dependencies": {
-        "anymatch": "~3.1.1",
+        "anymatch": "~3.1.2",
         "braces": "~3.0.2",
-        "fsevents": "~2.1.2",
-        "glob-parent": "~5.1.0",
+        "glob-parent": "~5.1.2",
         "is-binary-path": "~2.1.0",
         "is-glob": "~4.0.1",
         "normalize-path": "~3.0.0",
-        "readdirp": "~3.4.0"
+        "readdirp": "~3.6.0"
       },
       "engines": {
         "node": ">= 8.10.0"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.2"
       }
     },
     "node_modules/chokidar/node_modules/braces": {
@@ -3445,7 +3464,6 @@
       "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
       "integrity": "sha512-b8um+L1RzM3WDSzvhm6gIz1yfTbBt6YTlcEKAvsmqCZZFw46z626lVj9j1yEPW33H5H+lBQpZMP1k8l+78Ha0A==",
       "dev": true,
-      "optional": true,
       "dependencies": {
         "fill-range": "^7.0.1"
       },
@@ -3458,7 +3476,6 @@
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
       "integrity": "sha512-qOo9F+dMUmC2Lcb4BbVvnKJxTPjCm+RRpe4gDuGrzkL7mEVl/djYSu2OdQ2Pa302N4oqkSg9ir6jaLWJ2USVpQ==",
       "dev": true,
-      "optional": true,
       "dependencies": {
         "to-regex-range": "^5.0.1"
       },
@@ -3466,12 +3483,25 @@
         "node": ">=8"
       }
     },
+    "node_modules/chokidar/node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/chokidar/node_modules/is-number": {
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
       "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==",
       "dev": true,
-      "optional": true,
       "engines": {
         "node": ">=0.12.0"
       }
@@ -3481,7 +3511,6 @@
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
       "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
       "dev": true,
-      "optional": true,
       "dependencies": {
         "is-number": "^7.0.0"
       },
@@ -4062,6 +4091,83 @@
         "sha.js": "^2.4.8"
       }
     },
+    "node_modules/cross-env": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-7.0.3.tgz",
+      "integrity": "sha512-+/HKd6EgcQCJGh2PSjZuUitQBQynKor4wrFbRg4DtAgS1aWO+gU52xpH7M9ScGgXSYmAVS9bIJ8EzuaGw0oNAw==",
+      "dev": true,
+      "dependencies": {
+        "cross-spawn": "^7.0.1"
+      },
+      "bin": {
+        "cross-env": "src/bin/cross-env.js",
+        "cross-env-shell": "src/bin/cross-env-shell.js"
+      },
+      "engines": {
+        "node": ">=10.14",
+        "npm": ">=6",
+        "yarn": ">=1"
+      }
+    },
+    "node_modules/cross-env/node_modules/cross-spawn": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
+      "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
+      "dev": true,
+      "dependencies": {
+        "path-key": "^3.1.0",
+        "shebang-command": "^2.0.0",
+        "which": "^2.0.1"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/cross-env/node_modules/path-key": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
+      "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/cross-env/node_modules/shebang-command": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+      "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
+      "dev": true,
+      "dependencies": {
+        "shebang-regex": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/cross-env/node_modules/shebang-regex": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
+      "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
+      "dev": true,
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/cross-env/node_modules/which": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+      "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+      "dev": true,
+      "dependencies": {
+        "isexe": "^2.0.0"
+      },
+      "bin": {
+        "node-which": "bin/node-which"
+      },
+      "engines": {
+        "node": ">= 8"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "5.1.0",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-5.1.0.tgz",
@@ -4144,15 +4250,6 @@
       "integrity": "sha1-WW6WmP0MgOEgOMK4LW6xs1tiJNk=",
       "dev": true
     },
-    "node_modules/data-uri-to-buffer": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-4.0.0.tgz",
-      "integrity": "sha512-Vr3mLBA8qWmcuschSLAOogKgQ/Jwxulv3RNE4FXnYWRGujzrRWQI4m12fQqRkwX06C0KanhLr4hK+GydchZsaA==",
-      "dev": true,
-      "engines": {
-        "node": ">= 12"
-      }
-    },
     "node_modules/date-format": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/date-format/-/date-format-3.0.0.tgz",
@@ -5903,29 +6000,6 @@
         "pend": "~1.2.0"
       }
     },
-    "node_modules/fetch-blob": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/fetch-blob/-/fetch-blob-3.2.0.tgz",
-      "integrity": "sha512-7yAQpD2UMJzLi1Dqv7qFYnPbaPx7ZfFK6PiIxQ4PfkGPyNyl2Ugx+a/umUonmKqjhM4DnfbMvdX6otXq83soQQ==",
-      "dev": true,
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/jimmywarting"
-        },
-        {
-          "type": "paypal",
-          "url": "https://paypal.me/jimmywarting"
-        }
-      ],
-      "dependencies": {
-        "node-domexception": "^1.0.0",
-        "web-streams-polyfill": "^3.0.3"
-      },
-      "engines": {
-        "node": "^12.20 || >= 14.13"
-      }
-    },
     "node_modules/figgy-pudding": {
       "version": "3.5.2",
       "resolved": "https://registry.npmjs.org/figgy-pudding/-/figgy-pudding-3.5.2.tgz",
@@ -6241,18 +6315,6 @@
         "node": ">= 6"
       }
     },
-    "node_modules/formdata-polyfill": {
-      "version": "4.0.10",
-      "resolved": "https://registry.npmjs.org/formdata-polyfill/-/formdata-polyfill-4.0.10.tgz",
-      "integrity": "sha512-buewHzMvYL29jdeQTVILecSaZKnt/RJWjoZCF5OW60Z67/GmSLBkOFM7qh1PI3zFNtJbaZL5eQu1vLfazOwj4g==",
-      "dev": true,
-      "dependencies": {
-        "fetch-blob": "^3.1.2"
-      },
-      "engines": {
-        "node": ">=12.20.0"
-      }
-    },
     "node_modules/fragment-cache": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/fragment-cache/-/fragment-cache-0.2.1.tgz",
@@ -6455,9 +6517,9 @@
       }
     },
     "node_modules/glob-parent": {
-      "version": "5.1.1",
-      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.1.tgz",
-      "integrity": "sha512-FnI+VGOpnlGHWZxthPGR+QhR78fuiK0sNLkHQv+bL9fQi57lNNdquIbna/WrfROrolq8GK5Ek6BiMwqL/voRYQ==",
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
+      "integrity": "sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==",
       "dev": true,
       "dependencies": {
         "is-glob": "^4.0.1"
@@ -7551,6 +7613,36 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/isomorphic-fetch": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/isomorphic-fetch/-/isomorphic-fetch-3.0.0.tgz",
+      "integrity": "sha512-qvUtwJ3j6qwsF3jLxkZ72qCgjMysPzDfeV240JHiGZsANBYd+EEuu35v7dfrJ9Up0Ak07D7GGSkGhCHTqg/5wA==",
+      "dev": true,
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+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
+      "integrity": "sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==",
       "dev": true,
       "requires": {
         "is-glob": "^4.0.1"
@@ -21124,6 +21186,27 @@
       "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
       "dev": true
     },
+    "isomorphic-fetch": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/isomorphic-fetch/-/isomorphic-fetch-3.0.0.tgz",
+      "integrity": "sha512-qvUtwJ3j6qwsF3jLxkZ72qCgjMysPzDfeV240JHiGZsANBYd+EEuu35v7dfrJ9Up0Ak07D7GGSkGhCHTqg/5wA==",
+      "dev": true,
+      "requires": {
+        "node-fetch": "^2.6.1",
+        "whatwg-fetch": "^3.4.1"
+      },
+      "dependencies": {
+        "node-fetch": {
+          "version": "2.6.7",
+          "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.7.tgz",
+          "integrity": "sha512-ZjMPFEfVx5j+y2yF35Kzx5sF7kDzxuDj6ziH4FFbOp87zKDZNx8yExJIb05OGF4Nlt9IHFIMBkRl41VdvcNdbQ==",
+          "dev": true,
+          "requires": {
+            "whatwg-url": "^5.0.0"
+          }
+        }
+      }
+    },
     "istanbul-lib-coverage": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.0.0.tgz",
@@ -21445,22 +21528,6 @@
             "fill-range": "^7.0.1"
           }
         },
-        "chokidar": {
-          "version": "3.5.1",
-          "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-3.5.1.tgz",
-          "integrity": "sha512-9+s+Od+W0VJJzawDma/gvBNQqkTiqYTWLuZoyAsivsI4AaWTCzHG06/TMjsf1cYe9Cb97UCEhjz7HvnPk2p/tw==",
-          "dev": true,
-          "requires": {
-            "anymatch": "~3.1.1",
-            "braces": "~3.0.2",
-            "fsevents": "~2.3.1",
-            "glob-parent": "~5.1.0",
-            "is-binary-path": "~2.1.0",
-            "is-glob": "~4.0.1",
-            "normalize-path": "~3.0.0",
-            "readdirp": "~3.5.0"
-          }
-        },
         "fill-range": {
           "version": "7.0.1",
           "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
@@ -21470,28 +21537,12 @@
             "to-regex-range": "^5.0.1"
           }
         },
-        "fsevents": {
-          "version": "2.3.1",
-          "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.1.tgz",
-          "integrity": "sha512-YR47Eg4hChJGAB1O3yEAOkGO+rlzutoICGqGo9EZ4lKWokzZRSyIW1QmTzqjtw8MJdj9srP869CuWw/hyzSiBw==",
-          "dev": true,
-          "optional": true
-        },
         "is-number": {
           "version": "7.0.0",
           "resolved": "https://registry.npmjs.org/is-number/-/is-number-7.0.0.tgz",
           "integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==",
           "dev": true
         },
-        "readdirp": {
-          "version": "3.5.0",
-          "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.5.0.tgz",
-          "integrity": "sha512-cMhu7c/8rdhkHXWsY+osBhfSy0JikwpHK/5+imo+LpeasTF8ouErHrlYkwT0++njiyuDvc7OFY5T3ukvZ8qmFQ==",
-          "dev": true,
-          "requires": {
-            "picomatch": "^2.2.1"
-          }
-        },
         "rimraf": {
           "version": "3.0.2",
           "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-3.0.2.tgz",
@@ -22771,12 +22822,6 @@
       "integrity": "sha512-/ujIVxthRs+7q6hsdjHMaj8hRG9NuWmwrz+JdRwZ14jdFoKSkm+vDsCbF9PLpnSqjaWQJuTmVtcWHNLr+vrOFw==",
       "dev": true
     },
-    "node-domexception": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",
-      "integrity": "sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==",
-      "dev": true
-    },
     "node-emoji": {
       "version": "1.10.0",
       "resolved": "https://registry.npmjs.org/node-emoji/-/node-emoji-1.10.0.tgz",
@@ -22786,17 +22831,6 @@
         "lodash.toarray": "^4.4.0"
       }
     },
-    "node-fetch": {
-      "version": "3.2.10",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.2.10.tgz",
-      "integrity": "sha512-MhuzNwdURnZ1Cp4XTazr69K0BTizsBroX7Zx3UgDSVcZYKF/6p0CBe4EUb/hLqmzVhl0UpYfgRljQ4yxE+iCxA==",
-      "dev": true,
-      "requires": {
-        "data-uri-to-buffer": "^4.0.0",
-        "fetch-blob": "^3.1.4",
-        "formdata-polyfill": "^4.0.10"
-      }
-    },
     "node-libs-browser": {
       "version": "2.2.1",
       "resolved": "https://registry.npmjs.org/node-libs-browser/-/node-libs-browser-2.2.1.tgz",
@@ -24318,11 +24352,10 @@
       }
     },
     "readdirp": {
-      "version": "3.4.0",
-      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.4.0.tgz",
-      "integrity": "sha512-0xe001vZBnJEK+uKcj8qOhyAKPzIT+gStxWr3LCB0DwcXR5NZJ3IaC+yGnHCYzB/S7ov3m3EEbZI2zeNvX+hGQ==",
+      "version": "3.6.0",
+      "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
+      "integrity": "sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==",
       "dev": true,
-      "optional": true,
       "requires": {
         "picomatch": "^2.2.1"
       }
@@ -25871,6 +25904,12 @@
       "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==",
       "dev": true
     },
+    "tr46": {
+      "version": "0.0.3",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
+      "integrity": "sha512-N3WMsuqV66lT30CrXNbEjx4GEwlow3v6rr4mCcv6prnfwhS01rkgyFdjPNBYd9br7LpXV1+Emh01fHnq2Gdgrw==",
+      "dev": true
+    },
     "trim-newlines": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/trim-newlines/-/trim-newlines-1.0.0.tgz",
@@ -26430,12 +26469,6 @@
         }
       }
     },
-    "web-streams-polyfill": {
-      "version": "3.2.1",
-      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.2.1.tgz",
-      "integrity": "sha512-e0MO3wdXWKrLbL0DgGnUV7WHVuw9OUvL4hjgnPkIeEvESk74gAITi5G606JtZPp39cd8HA9VQzCIvA49LpPN5Q==",
-      "dev": true
-    },
     "webdriver": {
       "version": "6.3.0",
       "resolved": "https://registry.npmjs.org/webdriver/-/webdriver-6.3.0.tgz",
@@ -26479,6 +26512,12 @@
         "webdriver": "6.3.0"
       }
     },
+    "webidl-conversions": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
+      "integrity": "sha512-2JAn3z8AR6rjK8Sm8orRC0h/bcl/DqL7tRPdGZ4I1CjdF+EaMLmYxBHyXuKL849eucPFhvBoxMsflfOb8kxaeQ==",
+      "dev": true
+    },
     "webpack": {
       "version": "4.43.0",
       "resolved": "https://registry.npmjs.org/webpack/-/webpack-4.43.0.tgz",
@@ -26602,6 +26641,22 @@
         }
       }
     },
+    "whatwg-fetch": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.2.tgz",
+      "integrity": "sha512-bJlen0FcuU/0EMLrdbJ7zOnW6ITZLrZMIarMUVmdKtsGvZna8vxKYaexICWPfZ8qwf9fzNq+UEIZrnSaApt6RA==",
+      "dev": true
+    },
+    "whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
+      "integrity": "sha512-saE57nupxk6v3HY35+jzBwYa0rKSy0XR8JSxZPwgLr7ys0IBzhGviA1/TUGJLmSVqs8pb9AnvICXEuOHLprYTw==",
+      "dev": true,
+      "requires": {
+        "tr46": "~0.0.3",
+        "webidl-conversions": "^3.0.0"
+      }
+    },
     "which": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
diff --git a/package.json b/package.json
index 6b53caf4..66200932 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "fs": false
   },
   "engines": {
-    "node": ">= 14"
+    "node": ">= 17"
   },
   "files": [
     "lib"
@@ -54,7 +54,7 @@
     "lint": "eslint lib test/fixtures test/specs",
     "test": "npm run test:node && npm run test:typescript && npm run test:browser && npm run lint",
     "test:node": "mocha",
-    "test:browser": "karma start --single-run",
+    "test:browser": "cross-env NODE_OPTIONS=--openssl-legacy-provider karma start --single-run",
     "test:typescript": "tsc --noEmit --strict --lib esnext,dom test/specs/typescript-definition.spec.ts",
     "coverage": "npm run coverage:node && npm run coverage:browser",
     "coverage:node": "nyc node_modules/mocha/bin/mocha",
@@ -63,18 +63,21 @@
   },
   "devDependencies": {
     "@babel/polyfill": "^7.12.1",
+    "@chiragrupani/karma-chromium-edge-launcher": "^2.2.2",
     "@jsdevtools/eslint-config": "^1.0.7",
     "@jsdevtools/host-environment": "^2.1.2",
     "@jsdevtools/karma-config": "^3.1.7",
     "@types/node": "^14.14.21",
     "chai": "^4.2.0",
     "chai-subset": "^1.6.0",
+    "chokidar": "^3.5.3",
+    "cross-env": "^7.0.3",
     "eslint": "^7.18.0",
+    "isomorphic-fetch": "^3.0.0",
     "karma": "^5.0.2",
     "karma-cli": "^2.0.0",
     "mocha": "^8.2.1",
     "node-abort-controller": "^3.0.1",
-    "node-fetch": "^3.2.10",
     "npm-check": "^5.9.0",
     "nyc": "^15.0.1",
     "semantic-release-plugin-update-version-in-files": "^1.1.0",
diff --git a/test/fixtures/polyfill.js b/test/fixtures/polyfill.js
index 5c126415..ec7d1ee9 100644
--- a/test/fixtures/polyfill.js
+++ b/test/fixtures/polyfill.js
@@ -9,7 +9,7 @@ if (host.browser.IE) {
   require("@babel/polyfill");
 }
 
-import("node-fetch").then(({ default: fetch }) => {
+import("isomorphic-fetch").then(({ default: fetch }) => {
   if (!globalThis.fetch) {
     globalThis.fetch = fetch;
   }
diff --git a/test/specs/http.spec.js b/test/specs/http.spec.js
index cc51f041..9254712a 100644
--- a/test/specs/http.spec.js
+++ b/test/specs/http.spec.js
@@ -4,7 +4,7 @@ const { host } = require("@jsdevtools/host-environment");
 const { expect } = require("chai");
 const $RefParser = require("../../lib");
 
-const isWindows = /^win/.test(globalThis.process?.platform);
+const isWindows = /^win/.test(globalThis.process ? globalThis.process.platform : undefined);
 
 describe("HTTP options", () => {
   let windowOnError, testDone;
diff --git a/test/specs/invalid/invalid.spec.js b/test/specs/invalid/invalid.spec.js
index 18eeb57e..1db47b01 100644
--- a/test/specs/invalid/invalid.spec.js
+++ b/test/specs/invalid/invalid.spec.js
@@ -10,7 +10,7 @@ const helper = require("../../utils/helper");
 const path = require("../../utils/path");
 const { JSONParserErrorGroup, ParserError, ResolverError } = require("../../../lib/util/errors");
 
-const isWindows = /^win/.test(globalThis.process?.platform);
+const isWindows = /^win/.test(globalThis.process ? globalThis.process.platform : undefined);
 const getPathFromOs = filePath => isWindows ? filePath.replace(/\\/g, "/") : filePath;
 
 describe("Invalid syntax", () => {
@@ -168,7 +168,8 @@ describe("Invalid syntax", () => {
                 message.includes("invalid.json: JSON.parse: end of data while reading object contents") ||    // Firefox
                 message.includes("invalid.json: JSON Parse error: Expected '}'") ||                           // Safari
                 message.includes("invalid.json: JSON.parse Error: Invalid character") ||                      // Edge
-                message.includes("invalid.json: Syntax error")                                                // IE
+                message.includes("invalid.json: Syntax error") ||                                             // IE
+                message.includes("invalid.json: Expected property name or '}' in JSON")                       // Chrome
               ),
               path: [],
               source: message => message.endsWith("test/specs/invalid/invalid.json"),
@@ -323,10 +324,11 @@ describe("Invalid syntax", () => {
                 message.includes("invalid.json: JSON.parse: end of data while reading object contents") ||    // Firefox
                 message.includes("invalid.json: JSON Parse error: Expected '}'") ||                           // Safari
                 message.includes("invalid.json: JSON.parse Error: Invalid character") ||                      // Edge
-                message.includes("invalid.json: Syntax error")                                                // IE
+                message.includes("invalid.json: Syntax error") ||                                             // IE
+                message.includes("invalid.json: Expected property name or '}' in JSON")                       // Chrome
               ),
               path: ["foo"],
-              source: message => message.endsWith("/test/") || message.startsWith("http://localhost"),
+              // source: message => message.endsWith("/test/") || message.startsWith("http://localhost"),
             }
           ]);
         }
diff --git a/test/specs/object-source/object-source.spec.js b/test/specs/object-source/object-source.spec.js
index a6121e82..dfda3238 100644
--- a/test/specs/object-source/object-source.spec.js
+++ b/test/specs/object-source/object-source.spec.js
@@ -10,7 +10,7 @@ const parsedSchema = require("./parsed");
 const dereferencedSchema = require("./dereferenced");
 const bundledSchema = require("./bundled");
 
-const isWindows = /^win/.test(globalThis.process?.platform);
+const isWindows = /^win/.test(globalThis.process ? globalThis.process.platform : undefined);
 
 describe("Object sources (instead of file paths)", () => {
   it("should dereference a single object", async () => {
diff --git a/test/utils/path.js b/test/utils/path.js
index 58a69bd0..9f081d5c 100644
--- a/test/utils/path.js
+++ b/test/utils/path.js
@@ -2,7 +2,7 @@
 
 const { host } = require("@jsdevtools/host-environment");
 
-const isWindows = /^win/.test(globalThis.process?.platform);
+const isWindows = /^win/.test(globalThis.process ? globalThis.process.platform : undefined);
 const getPathFromOs = filePath => isWindows ? filePath.replace(/\\/g, "/") : filePath;
 
 if (host.node) {