diff --git a/package-lock.json b/package-lock.json
index 6fe881d..62f280f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -255,6 +255,25 @@
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+      "resolved": "https://registry.npmjs.org/vinyl-sourcemap/-/vinyl-sourcemap-1.1.0.tgz",
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+      "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"
+      },
+      "dependencies": {
+        "clone": {
+          "version": "2.1.2",
+          "resolved": "https://registry.npmjs.org/clone/-/clone-2.1.2.tgz",
+          "integrity": "sha512-3Pe/CF1Nn94hyhIYpjtiLhdCoEoz0DqQ+988E9gmeEdQZlojxnOb74wctFyuwWQHzqyf9X7C7MG8juUpqBJT8w==",
+          "dev": true
+        },
+        "clone-stats": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/clone-stats/-/clone-stats-1.0.0.tgz",
+          "integrity": "sha512-au6ydSpg6nsrigcZ4m8Bc9hxjeW+GJ8xh5G3BJCMt4WXe1H10UNaVOamqQTmrx1kjVuxAHIQSNU6hY4Nsn9/ag==",
+          "dev": true
+        },
+        "replace-ext": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/replace-ext/-/replace-ext-1.0.1.tgz",
+          "integrity": "sha512-yD5BHCe7quCgBph4rMQ+0KkIRKwWCrHDOX1p1Gp6HwjPM5kVoCdKGNhN7ydqqsX6lJEnQDKZ/tFMiEdQ1dvPEw==",
+          "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",
+            "replace-ext": "^1.0.0"
+          }
+        }
+      }
+    },
     "vinyl-sourcemaps-apply": {
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/vinyl-sourcemaps-apply/-/vinyl-sourcemaps-apply-0.2.1.tgz",
diff --git a/package.json b/package.json
index a82f75f..8c8906e 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "babelify": "^8.0.0",
     "browserify": "^16.2.2",
     "del": "^3.0.0",
-    "gulp": "^3.8.11",
+    "gulp": "^4.0.2",
     "gulp-autoprefixer": "^3.1.0",
     "gulp-clean-css": "^3.10.0",
     "gulp-eslint": "^5.0.0",
@@ -33,7 +33,7 @@
     "gulp-sourcemaps": "^2.6.4",
     "gulp-uglify": "^1.1.0",
     "node-notifier": "^5.2.1",
-    "rev-del": "^1.0.5",
+    "rev-del": "^2.0.0",
     "run-sequence": "^2.2.1",
     "vinyl-buffer": "^1.0.1",
     "vinyl-source-stream": "^2.0.0"