diff --git a/package-lock.json b/package-lock.json
index bbf0f56..68e769d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -156,6 +156,15 @@
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@@ -478,6 +580,23 @@
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@@ -858,6 +983,16 @@
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@@ -7596,6 +8154,12 @@
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diff --git a/package.json b/package.json
index 5473ff3..4d56d07 100644
--- a/package.json
+++ b/package.json
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     "browser-sync": "^2.13.0",
     "commander": "2.10.0",
     "eyeglass": "^0.8.3",
-    "gulp": "^3.9.0",
+    "gulp": "^4.0.2",
     "gulp-concat": "^2.6.0",
     "gulp-eslint": "^2.0.0",
     "gulp-if": "^2.0.0",