diff --git a/_dev/package-lock.json b/_dev/package-lock.json
index 403f25d..6e493bb 100644
--- a/_dev/package-lock.json
+++ b/_dev/package-lock.json
@@ -1248,6 +1248,15 @@
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-   "integrity": "sha1-p5SvDAWrF1KEbudTofIRoFugxE8=",
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@@ -1352,6 +1379,41 @@
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+    "process-nextick-args": "^2.0.0",
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@@ -1597,6 +1699,23 @@
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@@ -2068,6 +2187,12 @@
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    "integrity": "sha1-uI+UqCzzi4eR1YBG6kAprYjKmdE="
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+   "resolved": "https://registry.npmjs.org/cloneable-readable/-/cloneable-readable-1.1.3.tgz",
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    "dev": true
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    "dev": true,
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-    "clone": "^1.0.2"
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@@ -3276,6 +3487,16 @@
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-   "integrity": "sha1-jhdyBsPICDfYVjLouTWd/osvbq8=",
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    "dev": true,
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-    "once": "~1.3.0"
+    "once": "^1.4.0"
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@@ -3832,6 +4064,12 @@
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-    "strip-bom": "^1.0.0",
-    "through2": "^0.6.1",
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+    "lead": "^1.0.0",
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-      "clone-stats": "^0.0.1"
+      "clone": "^2.1.1",
+      "clone-buffer": "^1.0.0",
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diff --git a/_dev/package.json b/_dev/package.json
index 8852cad..2a1d33a 100644
--- a/_dev/package.json
+++ b/_dev/package.json
@@ -24,7 +24,7 @@
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   "connect": "^3.7.0",
   "fs": "0.0.1-security",
-  "gulp": "^3.9.1",
+  "gulp": "^4.0.2",
   "gulp-deploy-ftp": "^1.0.1",
   "gulp-postcss": "^8.0.0",
   "gulp-sass": "^4.0.2",