diff --git a/index.js b/index.js
index 962e4af..e801a03 100644
--- a/index.js
+++ b/index.js
@@ -1,10 +1,10 @@
-var through = require('through2');
-var crypto = require('crypto');
-var gutil = require('gulp-util');
-var path = require('path');
-var urlparse = require('url').parse;
+import through from 'through2';
+import crypto from 'crypto';
+import gutil from 'gulp-util';
+import path from 'path';
+import { parse as urlparse } from 'url';
 
-module.exports = function override() {
+function override() {
     var allowedPathRegExp = /\.css$/;
     var cssUrlRegExp = /url\(['"]?([^'"\)]*)['"]?\)/gi;
 
@@ -41,7 +41,7 @@ module.exports = function override() {
                 var contents = file.contents.toString();
 
                 contents = contents.replace(cssUrlRegExp, function(m, url) {
-                  parsed = urlparse(url);
+                  var parsed = urlparse(url);
                   if(parsed.host) {
                     return m;
                   }
@@ -69,4 +69,6 @@ module.exports = function override() {
         });
         cb();
     });
-};
+}
+
+export default override;
diff --git a/package-lock.json b/package-lock.json
index 3eed4c9..7011f51 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
         "chai": "^4.3.8",
         "fs-extra": "^11.1.1",
         "gulp": "^4.0.2",
-        "gulp-rev": "^9.0.0",
+        "gulp-rev": "^10.0.0",
         "jshint": "^2.13.6",
         "mocha": "^10.2.0"
       },
@@ -25,6 +25,28 @@
         "gulp-rev": ">= 5 < 10"
       }
     },
+    "node_modules/@types/expect": {
+      "version": "1.20.4",
+      "resolved": "https://registry.npmjs.org/@types/expect/-/expect-1.20.4.tgz",
+      "integrity": "sha512-Q5Vn3yjTDyCMV50TB6VRIbQNxSE4OmZR86VSbGaNpfUolm0iePBB4KdEEHmxoY5sT2+2DIvXW0rvMDP2nHZ4Mg==",
+      "dev": true
+    },
+    "node_modules/@types/node": {
+      "version": "20.7.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.7.0.tgz",
+      "integrity": "sha512-zI22/pJW2wUZOVyguFaUL1HABdmSVxpXrzIqkjsHmyUjNhPoWM1CKfvVuXfetHhIok4RY573cqS0mZ1SJEnoTg==",
+      "dev": true
+    },
+    "node_modules/@types/vinyl": {
+      "version": "2.0.8",
+      "resolved": "https://registry.npmjs.org/@types/vinyl/-/vinyl-2.0.8.tgz",
+      "integrity": "sha512-bls3EAsYVnVoPKoqgFC4Rtq7Kzte4MCk8xMA9UEPPVncJFsov9FJWYj0uxqJRwNEi9b4i4zX13FydaDrhadmHg==",
+      "dev": true,
+      "dependencies": {
+        "@types/expect": "^1.20.4",
+        "@types/node": "*"
+      }
+    },
     "node_modules/ansi-colors": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
@@ -1204,6 +1226,18 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/easy-transform-stream": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/easy-transform-stream/-/easy-transform-stream-1.0.0.tgz",
+      "integrity": "sha512-kIEXvPNtqUQ/lrgkULIP0/l2m88Ahlk2ySZhmuLdRidXBIEPyHuDgDt04b9DvnCy+nIQDjpygVft+Op3PZFUQg==",
+      "dev": true,
+      "engines": {
+        "node": ">=14.16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/emoji-regex": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
@@ -1548,6 +1582,12 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/fast-fifo": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/fast-fifo/-/fast-fifo-1.3.2.tgz",
+      "integrity": "sha512-/d9sfos4yxzpwkDkuN7k2SqFKtYNmCTzgfEpz82x34IM9/zc8KGxQoXg1liNC/izpRM/MBdt44Nmx41ZWqk+FQ==",
+      "dev": true
+    },
     "node_modules/fast-levenshtein": {
       "version": "1.1.4",
       "resolved": "https://registry.npmjs.org/fast-levenshtein/-/fast-levenshtein-1.1.4.tgz",
@@ -1630,45 +1670,15 @@
       }
     },
     "node_modules/first-chunk-stream": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/first-chunk-stream/-/first-chunk-stream-2.0.0.tgz",
-      "integrity": "sha512-X8Z+b/0L4lToKYq+lwnKqi9X/Zek0NibLpsJgVsSxpoYq7JtiCtRb5HqKVEjEw/qAb/4AKKRLOwwKHlWNpm2Eg==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/first-chunk-stream/-/first-chunk-stream-5.0.0.tgz",
+      "integrity": "sha512-WdHo4ejd2cG2Dl+sLkW79SctU7mUQDfr4s1i26ffOZRs5mgv+BRttIM9gwcq0rDbemo0KlpVPaa3LBVLqPXzcQ==",
       "dev": true,
-      "dependencies": {
-        "readable-stream": "^2.0.2"
-      },
       "engines": {
-        "node": ">=0.10.0"
-      }
-    },
-    "node_modules/first-chunk-stream/node_modules/isarray": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
-      "integrity": "sha512-VLghIWNM6ELQzo7zwmcg0NmTVyWKYjvIeM83yjp0wRDTmUnrM678fQbcKBo6n2CJEF0szoG//ytg+TKla89ALQ==",
-      "dev": true
-    },
-    "node_modules/first-chunk-stream/node_modules/readable-stream": {
-      "version": "2.3.8",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.8.tgz",
-      "integrity": "sha512-8p0AUk4XODgIewSi0l8Epjs+EVnWiK7NoDIEGU0HhE7+ZyY8D1IMY7odu5lRrFXGg71L15KG8QrPmum45RTtdA==",
-      "dev": true,
-      "dependencies": {
-        "core-util-is": "~1.0.0",
-        "inherits": "~2.0.3",
-        "isarray": "~1.0.0",
-        "process-nextick-args": "~2.0.0",
-        "safe-buffer": "~5.1.1",
-        "string_decoder": "~1.1.1",
-        "util-deprecate": "~1.0.1"
-      }
-    },
-    "node_modules/first-chunk-stream/node_modules/string_decoder": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
-      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
-      "dev": true,
-      "dependencies": {
-        "safe-buffer": "~5.1.0"
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/flagged-respawn": {
@@ -2510,22 +2520,33 @@
       }
     },
     "node_modules/gulp-rev": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/gulp-rev/-/gulp-rev-9.0.0.tgz",
-      "integrity": "sha512-Ytx/uzDA2xNxHlPG8GReS1ut00msd0HlKDk9Ai/0xF2yvg+DAeGRAviCFlQzQmdZtqAoXznYspwWoGEoxDvhyA==",
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/gulp-rev/-/gulp-rev-10.0.0.tgz",
+      "integrity": "sha512-5mP6oOGp1DUzBQuiy9IrtyAWHWUOz2n1qLUHfo7LU0p111t7sTkUhKW01b70B2MsDWgScTdz6sGLg76KCbqclw==",
       "dev": true,
       "dependencies": {
-        "modify-filename": "^1.1.0",
-        "plugin-error": "^1.0.1",
-        "rev-hash": "^2.0.0",
-        "rev-path": "^2.0.0",
-        "sort-keys": "^2.0.0",
-        "through2": "^2.0.0",
-        "vinyl": "^2.1.0",
-        "vinyl-file": "^3.0.0"
+        "easy-transform-stream": "^1.0.0",
+        "modify-filename": "^2.0.0",
+        "plugin-error": "^2.0.1",
+        "rev-hash": "^4.0.0",
+        "rev-path": "^3.0.0",
+        "sort-keys": "^5.0.0",
+        "vinyl": "^3.0.0",
+        "vinyl-file": "^5.0.0"
       },
       "engines": {
-        "node": ">=6"
+        "node": ">=16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      },
+      "peerDependencies": {
+        "gulp": ">=4"
+      },
+      "peerDependenciesMeta": {
+        "gulp": {
+          "optional": true
+        }
       }
     },
     "node_modules/gulp-rev/node_modules/clone-stats": {
@@ -2534,70 +2555,29 @@
       "integrity": "sha512-au6ydSpg6nsrigcZ4m8Bc9hxjeW+GJ8xh5G3BJCMt4WXe1H10UNaVOamqQTmrx1kjVuxAHIQSNU6hY4Nsn9/ag==",
       "dev": true
     },
-    "node_modules/gulp-rev/node_modules/isarray": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
-      "integrity": "sha512-VLghIWNM6ELQzo7zwmcg0NmTVyWKYjvIeM83yjp0wRDTmUnrM678fQbcKBo6n2CJEF0szoG//ytg+TKla89ALQ==",
-      "dev": true
-    },
-    "node_modules/gulp-rev/node_modules/readable-stream": {
-      "version": "2.3.8",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.8.tgz",
-      "integrity": "sha512-8p0AUk4XODgIewSi0l8Epjs+EVnWiK7NoDIEGU0HhE7+ZyY8D1IMY7odu5lRrFXGg71L15KG8QrPmum45RTtdA==",
-      "dev": true,
-      "dependencies": {
-        "core-util-is": "~1.0.0",
-        "inherits": "~2.0.3",
-        "isarray": "~1.0.0",
-        "process-nextick-args": "~2.0.0",
-        "safe-buffer": "~5.1.1",
-        "string_decoder": "~1.1.1",
-        "util-deprecate": "~1.0.1"
-      }
-    },
-    "node_modules/gulp-rev/node_modules/string_decoder": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
-      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
-      "dev": true,
-      "dependencies": {
-        "safe-buffer": "~5.1.0"
-      }
-    },
-    "node_modules/gulp-rev/node_modules/through2": {
-      "version": "2.0.5",
-      "resolved": "https://registry.npmjs.org/through2/-/through2-2.0.5.tgz",
-      "integrity": "sha512-/mrRod8xqpA+IHSLyGCQ2s8SPHiCDEeQJSep1jqLYeEUClOFG2Qsh+4FU6G9VeqpZnGW/Su8LQGc4YKni5rYSQ==",
+    "node_modules/gulp-rev/node_modules/replace-ext": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/replace-ext/-/replace-ext-2.0.0.tgz",
+      "integrity": "sha512-UszKE5KVK6JvyD92nzMn9cDapSk6w/CaFZ96CnmDMUqH9oowfxF/ZjRITD25H4DnOQClLA4/j7jLGXXLVKxAug==",
       "dev": true,
-      "dependencies": {
-        "readable-stream": "~2.3.6",
-        "xtend": "~4.0.1"
+      "engines": {
+        "node": ">= 10"
       }
     },
     "node_modules/gulp-rev/node_modules/vinyl": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-2.2.1.tgz",
-      "integrity": "sha512-LII3bXRFBZLlezoG5FfZVcXflZgWP/4dCwKtxd5ky9+LOtM4CS3bIRQsmR1KMnMW07jpE8fqR2lcxPZ+8sJIcw==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-3.0.0.tgz",
+      "integrity": "sha512-rC2VRfAVVCGEgjnxHUnpIVh3AGuk62rP3tqVrn+yab0YH7UULisC085+NYH+mnqf3Wx4SpSi1RQMwudL89N03g==",
       "dev": true,
       "dependencies": {
-        "clone": "^2.1.1",
-        "clone-buffer": "^1.0.0",
+        "clone": "^2.1.2",
         "clone-stats": "^1.0.0",
-        "cloneable-readable": "^1.0.0",
-        "remove-trailing-separator": "^1.0.1",
-        "replace-ext": "^1.0.0"
+        "remove-trailing-separator": "^1.1.0",
+        "replace-ext": "^2.0.0",
+        "teex": "^1.0.1"
       },
       "engines": {
-        "node": ">= 0.10"
-      }
-    },
-    "node_modules/gulp-rev/node_modules/xtend": {
-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
-      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=0.4"
+        "node": ">=10.13.0"
       }
     },
     "node_modules/gulp-util": {
@@ -3998,12 +3978,15 @@
       }
     },
     "node_modules/modify-filename": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/modify-filename/-/modify-filename-1.1.0.tgz",
-      "integrity": "sha512-EickqnKq3kVVaZisYuCxhtKbZjInCuwgwZWyAmRIp1NTMhri7r3380/uqwrUHfaDiPzLVTuoNy4whX66bxPVog==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/modify-filename/-/modify-filename-2.0.0.tgz",
+      "integrity": "sha512-VX9/MdgUN9StpSLImJ0+AyV2dxJJtyojIwRHF/Ja942tW7FTzxXI186jDSTk4k5wj2+59a4bRzFnJUgMSi+ygg==",
       "dev": true,
       "engines": {
-        "node": ">=0.10.0"
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/ms": {
@@ -4574,18 +4557,15 @@
       }
     },
     "node_modules/plugin-error": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/plugin-error/-/plugin-error-1.0.1.tgz",
-      "integrity": "sha512-L1zP0dk7vGweZME2i+EeakvUNqSrdiI3F91TwEoYiGrAfUXmVv6fJIq4g82PAXxNsWOp0J7ZqQy/3Szz0ajTxA==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/plugin-error/-/plugin-error-2.0.1.tgz",
+      "integrity": "sha512-zMakqvIDyY40xHOvzXka0kUvf40nYIuwRE8dWhti2WtjQZ31xAgBZBhxsK7vK3QbRXS1Xms/LO7B5cuAsfB2Gg==",
       "dev": true,
       "dependencies": {
-        "ansi-colors": "^1.0.1",
-        "arr-diff": "^4.0.0",
-        "arr-union": "^3.1.0",
-        "extend-shallow": "^3.0.2"
+        "ansi-colors": "^1.0.1"
       },
       "engines": {
-        "node": ">= 0.10"
+        "node": ">=10.13.0"
       }
     },
     "node_modules/plugin-error/node_modules/ansi-colors": {
@@ -4644,6 +4624,12 @@
         "pump": "^2.0.0"
       }
     },
+    "node_modules/queue-tick": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/queue-tick/-/queue-tick-1.0.1.tgz",
+      "integrity": "sha512-kJt5qhMxoszgU/62PLP1CJytzd2NKetjSRnyuj31fDd3Rlcz3fzlFdFLD1SItunPwyqEOkca6GbV612BWfaBag==",
+      "dev": true
+    },
     "node_modules/randombytes": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/randombytes/-/randombytes-2.1.0.tgz",
@@ -4925,24 +4911,30 @@
       }
     },
     "node_modules/rev-hash": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/rev-hash/-/rev-hash-2.0.0.tgz",
-      "integrity": "sha512-U6EkYZI87C3B5KS46HAEy+g+rtueIdfF9Zb6XBlGe3R/RaF3V8drN7nRFm7/swHOK1zQLGvIYwQ4Q6WDAAlynw==",
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/rev-hash/-/rev-hash-4.0.0.tgz",
+      "integrity": "sha512-5w/auZRs65pf1AkZIbfICeorQfOCb6XVWaHmDEbkMyjmyRMxck+W0Erdj9zffuBRXxn5cbKfgmWQ9GpgR8dFZQ==",
       "dev": true,
       "engines": {
-        "node": ">=4"
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/rev-path": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/rev-path/-/rev-path-2.0.0.tgz",
-      "integrity": "sha512-G5R2L9gYu9kEuqPfIFgO9gO+OhBWOAT83HyauOQmGHO6y9Fsa4acv+XsmNhNDrod0HDh1/VxJRmsffThzeHJlQ==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/rev-path/-/rev-path-3.0.0.tgz",
+      "integrity": "sha512-2fUuv6IC7Z+Vj+DXEunJYJDZuwSsaJJHeLar3n2PGvHSH7j5+Xpd/Xh7PenekH4WQhxFuHtsGwd1dCh/HvT6Gw==",
       "dev": true,
       "dependencies": {
-        "modify-filename": "^1.0.0"
+        "modify-filename": "^2.0.0"
       },
       "engines": {
-        "node": ">=4"
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/safe-buffer": {
@@ -5223,24 +5215,30 @@
       "dev": true
     },
     "node_modules/sort-keys": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/sort-keys/-/sort-keys-2.0.0.tgz",
-      "integrity": "sha512-/dPCrG1s3ePpWm6yBbxZq5Be1dXGLyLn9Z791chDC3NFrpkVbWGzkBwPN1knaciexFXgRJ7hzdnwZ4stHSDmjg==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/sort-keys/-/sort-keys-5.0.0.tgz",
+      "integrity": "sha512-Pdz01AvCAottHTPQGzndktFNdbRA75BgOfeT1hH+AMnJFv8lynkPi42rfeEhpx1saTEI3YNMWxfqu0sFD1G8pw==",
       "dev": true,
       "dependencies": {
-        "is-plain-obj": "^1.0.0"
+        "is-plain-obj": "^4.0.0"
       },
       "engines": {
-        "node": ">=4"
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/sort-keys/node_modules/is-plain-obj": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/is-plain-obj/-/is-plain-obj-1.1.0.tgz",
-      "integrity": "sha512-yvkRyxmFKEOQ4pNXCmJG5AEQNlXJS5LaONXo5/cLdTZdWvsZ1ioJEonLGAosKlMWE8lwUy/bJzMjcw8az73+Fg==",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/is-plain-obj/-/is-plain-obj-4.1.0.tgz",
+      "integrity": "sha512-+Pgi+vMuUNkJyExiMBt5IlFoMyKnr5zhJ4Uspz58WOhBF5QoIZkFyNHIbBAtHwzVAgk5RtndVNsDRN61/mmDqg==",
       "dev": true,
       "engines": {
-        "node": ">=0.10.0"
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/source-map": {
@@ -5433,6 +5431,16 @@
       "integrity": "sha512-AiisoFqQ0vbGcZgQPY1cdP2I76glaVA/RauYR4G4thNFgkTqr90yXTo4LYX60Jl+sIlPNHHdGSwo01AvbKUSVQ==",
       "dev": true
     },
+    "node_modules/streamx": {
+      "version": "2.15.1",
+      "resolved": "https://registry.npmjs.org/streamx/-/streamx-2.15.1.tgz",
+      "integrity": "sha512-fQMzy2O/Q47rgwErk/eGeLu/roaFWV0jVsogDmrszM9uIw8L5OA+t+V93MgYlufNptfjmYR1tOMWhei/Eh7TQA==",
+      "dev": true,
+      "dependencies": {
+        "fast-fifo": "^1.1.0",
+        "queue-tick": "^1.0.1"
+      }
+    },
     "node_modules/string_decoder": {
       "version": "0.10.31",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
@@ -5497,28 +5505,34 @@
       }
     },
     "node_modules/strip-bom-buf": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/strip-bom-buf/-/strip-bom-buf-1.0.0.tgz",
-      "integrity": "sha512-1sUIL1jck0T1mhOLP2c696BIznzT525Lkub+n4jjMHjhjhoAQA6Ye659DxdlZBr0aLDMQoTxKIpnlqxgtwjsuQ==",
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/strip-bom-buf/-/strip-bom-buf-3.0.1.tgz",
+      "integrity": "sha512-iJaWw2WroigLHzQysdc5WWeUc99p7ea7AEgB6JkY8CMyiO1yTVAA1gIlJJgORElUIR+lcZJkNl1OGChMhvc2Cw==",
       "dev": true,
       "dependencies": {
         "is-utf8": "^0.2.1"
       },
       "engines": {
-        "node": ">=4"
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/strip-bom-stream": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/strip-bom-stream/-/strip-bom-stream-2.0.0.tgz",
-      "integrity": "sha512-yH0+mD8oahBZWnY43vxs4pSinn8SMKAdml/EOGBewoe1Y0Eitd0h2Mg3ZRiXruUW6L4P+lvZiEgbh0NgUGia1w==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/strip-bom-stream/-/strip-bom-stream-5.0.0.tgz",
+      "integrity": "sha512-Yo472mU+3smhzqeKlIxClre4s4pwtYZEvDNQvY/sJpnChdaxmKuwU28UVx/v1ORKNMxkmj1GBuvxJQyBk6wYMQ==",
       "dev": true,
       "dependencies": {
-        "first-chunk-stream": "^2.0.0",
-        "strip-bom": "^2.0.0"
+        "first-chunk-stream": "^5.0.0",
+        "strip-bom-buf": "^3.0.0"
       },
       "engines": {
-        "node": ">=0.10.0"
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/strip-json-comments": {
@@ -5563,6 +5577,15 @@
         "es6-symbol": "^3.1.1"
       }
     },
+    "node_modules/teex": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/teex/-/teex-1.0.1.tgz",
+      "integrity": "sha512-eYE6iEI62Ni1H8oIa7KlDU6uQBtqr4Eajni3wX7rpfXD8ysFx8z0+dri+KWEPWpBsxXfxu58x/0jvTVT1ekOSg==",
+      "dev": true,
+      "dependencies": {
+        "streamx": "^2.12.5"
+      }
+    },
     "node_modules/through2": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/through2/-/through2-4.0.2.tgz",
@@ -6036,19 +6059,21 @@
       }
     },
     "node_modules/vinyl-file": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/vinyl-file/-/vinyl-file-3.0.0.tgz",
-      "integrity": "sha512-BoJDj+ca3D9xOuPEM6RWVtWQtvEPQiQYn82LvdxhLWplfQsBzBqtgK0yhCP0s1BNTi6dH9BO+dzybvyQIacifg==",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/vinyl-file/-/vinyl-file-5.0.0.tgz",
+      "integrity": "sha512-MvkPF/yA1EX7c6p+juVIvp9+Lxp70YUfNKzEWeHMKpUNVSnTZh2coaOqLxI0pmOe2V9nB+OkgFaMDkodaJUyGw==",
       "dev": true,
       "dependencies": {
-        "graceful-fs": "^4.1.2",
-        "pify": "^2.3.0",
-        "strip-bom-buf": "^1.0.0",
-        "strip-bom-stream": "^2.0.0",
-        "vinyl": "^2.0.1"
+        "@types/vinyl": "^2.0.7",
+        "strip-bom-buf": "^3.0.1",
+        "strip-bom-stream": "^5.0.0",
+        "vinyl": "^3.0.0"
       },
       "engines": {
-        "node": ">=4"
+        "node": ">=14.16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
       }
     },
     "node_modules/vinyl-file/node_modules/clone-stats": {
@@ -6057,21 +6082,29 @@
       "integrity": "sha512-au6ydSpg6nsrigcZ4m8Bc9hxjeW+GJ8xh5G3BJCMt4WXe1H10UNaVOamqQTmrx1kjVuxAHIQSNU6hY4Nsn9/ag==",
       "dev": true
     },
+    "node_modules/vinyl-file/node_modules/replace-ext": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/replace-ext/-/replace-ext-2.0.0.tgz",
+      "integrity": "sha512-UszKE5KVK6JvyD92nzMn9cDapSk6w/CaFZ96CnmDMUqH9oowfxF/ZjRITD25H4DnOQClLA4/j7jLGXXLVKxAug==",
+      "dev": true,
+      "engines": {
+        "node": ">= 10"
+      }
+    },
     "node_modules/vinyl-file/node_modules/vinyl": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-2.2.1.tgz",
-      "integrity": "sha512-LII3bXRFBZLlezoG5FfZVcXflZgWP/4dCwKtxd5ky9+LOtM4CS3bIRQsmR1KMnMW07jpE8fqR2lcxPZ+8sJIcw==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-3.0.0.tgz",
+      "integrity": "sha512-rC2VRfAVVCGEgjnxHUnpIVh3AGuk62rP3tqVrn+yab0YH7UULisC085+NYH+mnqf3Wx4SpSi1RQMwudL89N03g==",
       "dev": true,
       "dependencies": {
-        "clone": "^2.1.1",
-        "clone-buffer": "^1.0.0",
+        "clone": "^2.1.2",
         "clone-stats": "^1.0.0",
-        "cloneable-readable": "^1.0.0",
-        "remove-trailing-separator": "^1.0.1",
-        "replace-ext": "^1.0.0"
+        "remove-trailing-separator": "^1.1.0",
+        "replace-ext": "^2.0.0",
+        "teex": "^1.0.1"
       },
       "engines": {
-        "node": ">= 0.10"
+        "node": ">=10.13.0"
       }
     },
     "node_modules/vinyl-fs": {
diff --git a/package.json b/package.json
index 6ead2c5..5013785 100644
--- a/package.json
+++ b/package.json
@@ -27,11 +27,12 @@
     "assets",
     "gulp-rev"
   ],
+	"type": "module",
   "devDependencies": {
     "chai": "^4.3.8",
     "fs-extra": "^11.1.1",
     "gulp": "^4.0.2",
-    "gulp-rev": "^9.0.0",
+    "gulp-rev": "^10.0.0",
     "jshint": "^2.13.6",
     "mocha": "^10.2.0"
   },
@@ -46,5 +47,8 @@
   "scripts": {
     "test": "mocha test.js -R list",
     "lint": "jshint index.js test.js"
-  }
+  },
+	"jshintConfig": {
+		"esversion": 6
+	}
 }
diff --git a/test.js b/test.js
index c713454..7878116 100644
--- a/test.js
+++ b/test.js
@@ -1,10 +1,11 @@
-var rev = require('gulp-rev');
-var fs = require('fs');
-var gulp = require('gulp');
-var fse = require('fs-extra');
-var override = require('./index');
-var expect = require('chai').expect;
-var through = require('through2');
+import rev from 'gulp-rev';
+import fs from 'fs';
+import gulp from 'gulp';
+import fse from 'fs-extra';
+import { expect } from 'chai';
+import through from 'through2';
+
+import override from './index.js';
 
 describe('gulp-rev-css-url', function () {
     beforeEach(function (done) {
@@ -17,7 +18,7 @@ describe('gulp-rev-css-url', function () {
             expectedFunnyURLs = fs.readFileSync('./expected/funny_urls.css', 'utf-8'),
             expectedFont1 = fs.readFileSync('./expected/montserrat-light-webfont.woff', 'utf-8'),
             expectedFont2 = fs.readFileSync('./expected/montserrat-light-webfont.woff2', 'utf-8'),
-            expectedManifest = require('./expected/rev-manifest.json', 'utf-8');
+            expectedManifest = JSON.parse(fs.readFileSync('./expected/rev-manifest.json', 'utf-8'));
         gulp.src('./fixtures/**/*')
             .pipe(rev())
             .pipe(override())
@@ -26,7 +27,7 @@ describe('gulp-rev-css-url', function () {
             .pipe(gulp.dest('./results/'))
             .on('end', function () {
                 // check manifest
-                var manifest = require('./results/rev-manifest.json', 'utf-8');
+              var manifest = JSON.parse(fs.readFileSync('./results/rev-manifest.json', 'utf-8'));
                 expect(manifest).to.deep.equal(expectedManifest);
 
                 // load results