diff --git a/package-lock.json b/package-lock.json
index ac9eed0..3eb349a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2241,18 +2241,48 @@
       "dev": true
     },
     "del": {
-      "version": "2.2.2",
-      "resolved": "https://registry.npmjs.org/del/-/del-2.2.2.tgz",
-      "integrity": "sha1-wSyYHQZ4RshLyvhiz/kw2Qf/0ag=",
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/del/-/del-4.1.0.tgz",
+      "integrity": "sha512-C4kvKNlYrwXhKxz97BuohF8YoGgQ23Xm9lvoHmgT7JaPGprSEjk3+XFled74Yt/x0ZABUHg2D67covzAPUKx5Q==",
       "dev": true,
       "requires": {
-        "globby": "5.0.0",
-        "is-path-cwd": "1.0.0",
-        "is-path-in-cwd": "1.0.0",
-        "object-assign": "4.1.1",
-        "pify": "2.3.0",
-        "pinkie-promise": "2.0.1",
-        "rimraf": "2.6.2"
+        "globby": "^6.1.0",
+        "is-path-cwd": "^2.0.0",
+        "is-path-in-cwd": "^2.0.0",
+        "p-map": "^2.0.0",
+        "pify": "^4.0.1",
+        "rimraf": "^2.6.3"
+      },
+      "dependencies": {
+        "glob": {
+          "version": "7.1.3",
+          "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.3.tgz",
+          "integrity": "sha512-vcfuiIxogLV4DlGBHIUOwI0IbrJ8HWPc4MU7HzviGeNho/UJDfi6B5p3sHeWIQ0KGIU0Jpxi5ZHxemQfLkkAwQ==",
+          "dev": true,
+          "requires": {
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
+          }
+        },
+        "pify": {
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/pify/-/pify-4.0.1.tgz",
+          "integrity": "sha512-uB80kBFb/tfd68bVleG9T5GGsGPjJrLAUpR5PZIrhBnIaRTQRjqdJSsIKkOP6OAIFbj7GOrcudc5pNjZ+geV2g==",
+          "dev": true
+        },
+        "rimraf": {
+          "version": "2.6.3",
+          "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.3.tgz",
+          "integrity": "sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==",
+          "dev": true,
+          "requires": {
+            "glob": "^7.1.3"
+          }
+        }
       }
     },
     "delayed-stream": {
@@ -3602,6 +3632,52 @@
         "del": "2.2.2",
         "graceful-fs": "4.1.11",
         "write": "0.2.1"
+      },
+      "dependencies": {
+        "del": {
+          "version": "2.2.2",
+          "resolved": "https://registry.npmjs.org/del/-/del-2.2.2.tgz",
+          "integrity": "sha1-wSyYHQZ4RshLyvhiz/kw2Qf/0ag=",
+          "dev": true,
+          "requires": {
+            "globby": "^5.0.0",
+            "is-path-cwd": "^1.0.0",
+            "is-path-in-cwd": "^1.0.0",
+            "object-assign": "^4.0.1",
+            "pify": "^2.0.0",
+            "pinkie-promise": "^2.0.0",
+            "rimraf": "^2.2.8"
+          }
+        },
+        "globby": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/globby/-/globby-5.0.0.tgz",
+          "integrity": "sha1-69hGZ8oNuzMLmbz8aOrCvFQ3Dg0=",
+          "dev": true,
+          "requires": {
+            "array-union": "^1.0.1",
+            "arrify": "^1.0.0",
+            "glob": "^7.0.3",
+            "object-assign": "^4.0.1",
+            "pify": "^2.0.0",
+            "pinkie-promise": "^2.0.0"
+          }
+        },
+        "is-path-cwd": {
+          "version": "1.0.0",
+          "resolved": "https://registry.npmjs.org/is-path-cwd/-/is-path-cwd-1.0.0.tgz",
+          "integrity": "sha1-0iXsIxMuie3Tj9p2dHLmLmXxEG0=",
+          "dev": true
+        },
+        "is-path-in-cwd": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/is-path-in-cwd/-/is-path-in-cwd-1.0.1.tgz",
+          "integrity": "sha512-FjV1RTW48E7CWM7eE/J2NJvAEEVektecDBVBE5Hh3nM1Jd0kvhHtX68Pr3xsDf857xt3Y4AkwVULK1Vku62aaQ==",
+          "dev": true,
+          "requires": {
+            "is-path-inside": "^1.0.0"
+          }
+        }
       }
     },
     "flatten": {
@@ -4946,17 +5022,16 @@
       }
     },
     "globby": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/globby/-/globby-5.0.0.tgz",
-      "integrity": "sha1-69hGZ8oNuzMLmbz8aOrCvFQ3Dg0=",
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/globby/-/globby-6.1.0.tgz",
+      "integrity": "sha1-9abXDoOV4hyFj7BInWTfAkJNUGw=",
       "dev": true,
       "requires": {
-        "array-union": "1.0.2",
-        "arrify": "1.0.1",
-        "glob": "7.1.2",
-        "object-assign": "4.1.1",
-        "pify": "2.3.0",
-        "pinkie-promise": "2.0.1"
+        "array-union": "^1.0.1",
+        "glob": "^7.0.3",
+        "object-assign": "^4.0.1",
+        "pify": "^2.0.0",
+        "pinkie-promise": "^2.0.0"
       }
     },
     "globjoin": {
@@ -6628,27 +6703,27 @@
       "dev": true
     },
     "is-path-cwd": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/is-path-cwd/-/is-path-cwd-1.0.0.tgz",
-      "integrity": "sha1-0iXsIxMuie3Tj9p2dHLmLmXxEG0=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/is-path-cwd/-/is-path-cwd-2.0.0.tgz",
+      "integrity": "sha512-m5dHHzpOXEiv18JEORttBO64UgTEypx99vCxQLjbBvGhOJxnTNglYoFXxwo6AbsQb79sqqycQEHv2hWkHZAijA==",
       "dev": true
     },
     "is-path-in-cwd": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/is-path-in-cwd/-/is-path-in-cwd-1.0.0.tgz",
-      "integrity": "sha1-ZHdYK4IU1gI0YJRWcAO+ip6sBNw=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/is-path-in-cwd/-/is-path-in-cwd-2.0.0.tgz",
+      "integrity": "sha512-6Vz5Gc9s/sDA3JBVu0FzWufm8xaBsqy1zn8Q6gmvGP6nSDMw78aS4poBNeatWjaRpTpxxLn1WOndAiOlk+qY8A==",
       "dev": true,
       "requires": {
-        "is-path-inside": "1.0.0"
+        "is-path-inside": "^1.0.0"
       }
     },
     "is-path-inside": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/is-path-inside/-/is-path-inside-1.0.0.tgz",
-      "integrity": "sha1-/AbloWg/vaE95mev9xe7wQpI838=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/is-path-inside/-/is-path-inside-1.0.1.tgz",
+      "integrity": "sha1-jvW33lBDej/cprToZe96pVy0gDY=",
       "dev": true,
       "requires": {
-        "path-is-inside": "1.0.2"
+        "path-is-inside": "^1.0.1"
       }
     },
     "is-plain-obj": {
@@ -8595,6 +8670,12 @@
         "os-tmpdir": "1.0.2"
       }
     },
+    "p-map": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/p-map/-/p-map-2.0.0.tgz",
+      "integrity": "sha512-GO107XdrSUmtHxVoi60qc9tUl/KkNKm+X2CF4P9amalpGxv5YqVPJNfSb0wcA+syCopkZvYYIzW8OVTQW59x/w==",
+      "dev": true
+    },
     "parse-entities": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/parse-entities/-/parse-entities-1.1.1.tgz",
diff --git a/package.json b/package.json
index 412a920..c914c02 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   },
   "devDependencies": {
     "browser-sync": "^2.7.12",
-    "del": "^2.0.2",
+    "del": "^4.1.0",
     "gulp": "^4.0.0",
     "gulp-autoprefixer": "^3.1.1",
     "gulp-cache": "^0.4.1",