diff --git a/topics/web/styling/cssgrid/package-lock.json b/topics/web/styling/cssgrid/package-lock.json
index 4db237e..e66d636 100644
--- a/topics/web/styling/cssgrid/package-lock.json
+++ b/topics/web/styling/cssgrid/package-lock.json
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+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/vinyl-fs/-/vinyl-fs-3.0.3.tgz",
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+      "dev": true,
+      "requires": {
+        "fs-mkdirp-stream": "^1.0.0",
+        "glob-stream": "^6.1.0",
+        "graceful-fs": "^4.0.0",
+        "is-valid-glob": "^1.0.0",
+        "lazystream": "^1.0.0",
+        "lead": "^1.0.0",
+        "object.assign": "^4.0.4",
+        "pumpify": "^1.3.5",
+        "readable-stream": "^2.3.3",
+        "remove-bom-buffer": "^3.0.0",
+        "remove-bom-stream": "^1.2.0",
+        "resolve-options": "^1.1.0",
+        "through2": "^2.0.0",
+        "to-through": "^2.0.0",
+        "value-or-function": "^3.0.0",
+        "vinyl": "^2.0.0",
+        "vinyl-sourcemap": "^1.1.0"
+      }
+    },
+    "vinyl-sourcemap": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/vinyl-sourcemap/-/vinyl-sourcemap-1.1.0.tgz",
+      "integrity": "sha512-NiibMgt6VJGJmyw7vtzhctDcfKch4e4n9TBeoWlirb7FMg9/1Ov9k+A5ZRAtywBpRPiyECvQRQllYM8dECegVA==",
+      "dev": true,
+      "requires": {
+        "append-buffer": "^1.0.2",
+        "convert-source-map": "^1.5.0",
+        "graceful-fs": "^4.1.6",
+        "normalize-path": "^2.1.1",
+        "now-and-later": "^2.0.0",
+        "remove-bom-buffer": "^3.0.0",
+        "vinyl": "^2.0.0"
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@@ -4584,7 +4950,7 @@
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       "dev": true,
       "requires": {
-        "isexe": "2.0.0"
+        "isexe": "^2.0.0"
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@@ -4612,7 +4978,7 @@
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-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
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       "dev": true
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@@ -4633,9 +4999,9 @@
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-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
-      "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
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diff --git a/topics/web/styling/cssgrid/package.json b/topics/web/styling/cssgrid/package.json
index 819807f..9d3a755 100644
--- a/topics/web/styling/cssgrid/package.json
+++ b/topics/web/styling/cssgrid/package.json
@@ -11,6 +11,6 @@
   "license": "ISC",
   "devDependencies": {
     "browser-sync": "^2.26.3",
-    "gulp": "^3.9.1"
+    "gulp": "^4.0.2"
   }
 }