diff --git a/package-lock.json b/package-lock.json
index a6abdfc..002abfc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -390,6 +390,15 @@
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@@ -990,6 +1111,12 @@
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@@ -8790,6 +9739,27 @@
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@@ -8831,6 +9801,12 @@
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@@ -8871,7 +9847,7 @@
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@@ -8884,6 +9860,30 @@
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+      "resolved": "https://registry.npmjs.org/undertaker/-/undertaker-1.3.0.tgz",
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+        "bach": "^1.0.0",
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+        "object.defaults": "^1.0.0",
+        "object.reduce": "^1.0.0",
+        "undertaker-registry": "^1.0.0"
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+      "resolved": "https://registry.npmjs.org/undertaker-registry/-/undertaker-registry-1.0.1.tgz",
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-    "user-home": {
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@@ -9084,12 +10077,12 @@
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-      "integrity": "sha1-qrGh+jDUX4jdMhFIh1rALAtV5bQ=",
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/v8flags/-/v8flags-3.2.0.tgz",
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       "dev": true,
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-        "user-home": "^1.1.1"
+        "homedir-polyfill": "^1.0.1"
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     "vali-date": {
@@ -9109,6 +10102,12 @@
         "spdx-expression-parse": "^3.0.0"
       }
     },
+    "value-or-function": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/value-or-function/-/value-or-function-3.0.0.tgz",
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+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
@@ -9192,6 +10191,49 @@
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+      "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",
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+        "now-and-later": "^2.0.0",
+        "remove-bom-buffer": "^3.0.0",
+        "vinyl": "^2.0.0"
+      },
+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.2.tgz",
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+        },
+        "clone-stats": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/clone-stats/-/clone-stats-1.0.0.tgz",
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+          "dev": true
+        },
+        "vinyl": {
+          "version": "2.2.1",
+          "resolved": "https://registry.npmjs.org/vinyl/-/vinyl-2.2.1.tgz",
+          "integrity": "sha512-LII3bXRFBZLlezoG5FfZVcXflZgWP/4dCwKtxd5ky9+LOtM4CS3bIRQsmR1KMnMW07jpE8fqR2lcxPZ+8sJIcw==",
+          "dev": true,
+          "requires": {
+            "clone": "^2.1.1",
+            "clone-buffer": "^1.0.0",
+            "clone-stats": "^1.0.0",
+            "cloneable-readable": "^1.0.0",
+            "remove-trailing-separator": "^1.0.1",
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diff --git a/package.json b/package.json
index 59ea817..2549511 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
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     "grunt-contrib-watch": "~1.1.0",
     "grunt-svgmin": "~5.0.0",
-    "gulp": "^3.9.0",
+    "gulp": "^4.0.2",
     "gulp-shell": "^0.7.0",
     "lodash": "^4.17.19"
   }