diff --git a/package-lock.json b/package-lock.json
index 1d78d10e..b1683510 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7,7 +7,7 @@
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-      "resolved": "https://registry.npmjs.org/q-io/-/q-io-1.13.2.tgz",
-      "integrity": "sha1-7qEw1IHdteGqG8WmaFX3OR0G8AM=",
+    "pkg-dir": {
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+      "resolved": "https://registry.npmjs.org/pkg-dir/-/pkg-dir-4.2.0.tgz",
+      "integrity": "sha512-HRDzbaKjC+AOWVXxAU/x54COGeIv9eb+6CkDSQoNTt4XyWoIJvuPsXizxu/Fr23EiekbtZwmh1IcIG/l/a10GQ==",
       "dev": true,
       "requires": {
-        "collections": "^0.2.0",
-        "mime": "^1.2.11",
-        "mimeparse": "^0.1.4",
-        "q": "^1.0.1",
-        "qs": "^1.2.1",
-        "url2": "^0.0.0"
+        "find-up": "^4.0.0"
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-    "qs": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-1.2.2.tgz",
-      "integrity": "sha1-GbV/8k3CqZzh+L32r82ln472H4g=",
+    "semver": {
+      "version": "6.3.0",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+      "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
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     },
     "sigmund": {
@@ -372,12 +458,30 @@
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       "dev": true
     },
+    "strip-outer": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/strip-outer/-/strip-outer-1.0.1.tgz",
+      "integrity": "sha512-k55yxKHwaXnpYGsOzg4Vl8+tDrWylxDEpknGjhTiZB8dFRU5rTo9CAzeycivxV3s+zlTKwrs6WxMxR95n26kwg==",
+      "dev": true,
+      "requires": {
+        "escape-string-regexp": "^1.0.2"
+      }
+    },
     "supports-color": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-1.2.0.tgz",
       "integrity": "sha1-/x7R5hFp0Gs88tWI4YixjYhH4X4=",
       "dev": true
     },
+    "trim-repeated": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/trim-repeated/-/trim-repeated-1.0.0.tgz",
+      "integrity": "sha512-pkonvlKk8/ZuR0D5tLW8ljt5I8kmxp2XKymhepUeOdCEfKpZaktSArkLHZt76OB1ZvO9bssUsDty4SWhLvZpLg==",
+      "dev": true,
+      "requires": {
+        "escape-string-regexp": "^1.0.2"
+      }
+    },
     "uglify-js": {
       "version": "3.3.15",
       "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-3.3.15.tgz",
@@ -396,28 +500,16 @@
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-      "resolved": "https://registry.npmjs.org/url2/-/url2-0.0.0.tgz",
-      "integrity": "sha1-Tqq9HVw6yQ1iq0SFyZhCKGWgSxo=",
-      "dev": true
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-    "weak-map": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/weak-map/-/weak-map-1.0.0.tgz",
-      "integrity": "sha1-tm5Wqd8L0lp2u/G1FNsSkIBhSjc=",
+    "universalify": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
+      "integrity": "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg==",
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     "wrappy": {
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       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
-      "dev": true
-    },
-    "wrench": {
-      "version": "1.5.8",
-      "resolved": "https://registry.npmjs.org/wrench/-/wrench-1.5.8.tgz",
-      "integrity": "sha1-ejHJf3hpJG12xc8vXJd6HEyOWrU=",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
       "dev": true
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   }
diff --git a/package.json b/package.json
index d2ac5653..9490f636 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "A simple javascript image cropper",
   "main": "croppie.js",
   "devDependencies": {
-    "gh-pages": "^0.11.0",
+    "gh-pages": "^4.0.0",
     "mocha": "2.4.5",
     "uglify-js": "3.3.15"
   },