diff --git a/package-lock.json b/package-lock.json
index a5589a76..0e2ea1b9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -158,22 +158,34 @@
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-      "resolved": "https://registry.npmjs.org/@gulp-sourcemaps/identity-map/-/identity-map-1.0.2.tgz",
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+      "resolved": "https://registry.npmjs.org/@gulp-sourcemaps/identity-map/-/identity-map-2.0.1.tgz",
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       "dev": true,
       "requires": {
-        "acorn": "^5.0.3",
-        "css": "^2.2.1",
-        "normalize-path": "^2.1.1",
+        "acorn": "^6.4.1",
+        "normalize-path": "^3.0.0",
+        "postcss": "^7.0.16",
         "source-map": "^0.6.0",
-        "through2": "^2.0.3"
+        "through2": "^3.0.1"
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-          "version": "5.7.4",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
-          "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
+          "version": "6.4.2",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.2.tgz",
+          "integrity": "sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==",
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+        },
+        "inherits": {
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+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
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+          "dev": true
+        },
+        "normalize-path": {
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+          "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
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@@ -181,6 +193,16 @@
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           "dev": true
+        },
+        "through2": {
+          "version": "3.0.2",
+          "resolved": "https://registry.npmjs.org/through2/-/through2-3.0.2.tgz",
+          "integrity": "sha512-enaDQ4MUyP2W6ZyT6EsMzqBPZaM/avg8iuo+l2d3QCs0J+6RaqkHV/2/lOwDTueBHeJ/2LG9lrLW3d5rWPucuQ==",
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.4",
+            "readable-stream": "2 || 3"
+          }
         }
       }
     },
@@ -1734,22 +1756,37 @@
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     "css": {
-      "version": "2.2.4",
-      "resolved": "https://registry.npmjs.org/css/-/css-2.2.4.tgz",
-      "integrity": "sha512-oUnjmWpy0niI3x/mPL8dVEI1l7MnG3+HHyRPHf+YFSbK+svOhXpmSOcDURUh2aOCgl2grzrOPt1nHLuCVFULLw==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/css/-/css-3.0.0.tgz",
+      "integrity": "sha512-DG9pFfwOrzc+hawpmqX/dHYHJG+Bsdb0klhyi1sDneOgGOXy9wQIC8hzyVp1e4NRYDBdxcylvywPkkXCHAzTyQ==",
       "dev": true,
       "requires": {
-        "inherits": "^2.0.3",
+        "inherits": "^2.0.4",
         "source-map": "^0.6.1",
-        "source-map-resolve": "^0.5.2",
-        "urix": "^0.1.0"
+        "source-map-resolve": "^0.6.0"
       },
       "dependencies": {
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+          "dev": true
+        },
         "source-map": {
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           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
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           "dev": true
+        },
+        "source-map-resolve": {
+          "version": "0.6.0",
+          "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.6.0.tgz",
+          "integrity": "sha512-KXBr9d/fO/bWo97NXsPIAW1bFSBOuCnjbNTBMO7N59hsv5i9yzRDfcYwwt0l04+VqnKC+EwzvJZIP/qkuMgR/w==",
+          "dev": true,
+          "requires": {
+            "atob": "^2.1.2",
+            "decode-uri-component": "^0.2.0"
+          }
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@@ -5070,28 +5107,28 @@
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     "gulp-sourcemaps": {
-      "version": "2.6.5",
-      "resolved": "https://registry.npmjs.org/gulp-sourcemaps/-/gulp-sourcemaps-2.6.5.tgz",
-      "integrity": "sha512-SYLBRzPTew8T5Suh2U8jCSDKY+4NARua4aqjj8HOysBh2tSgT9u4jc1FYirAdPx1akUxxDeK++fqw6Jg0LkQRg==",
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/gulp-sourcemaps/-/gulp-sourcemaps-3.0.0.tgz",
+      "integrity": "sha512-RqvUckJkuYqy4VaIH60RMal4ZtG0IbQ6PXMNkNsshEGJ9cldUPRb/YCgboYae+CLAs1HQNb4ADTKCx65HInquQ==",
       "dev": true,
       "requires": {
-        "@gulp-sourcemaps/identity-map": "1.X",
-        "@gulp-sourcemaps/map-sources": "1.X",
-        "acorn": "5.X",
-        "convert-source-map": "1.X",
-        "css": "2.X",
-        "debug-fabulous": "1.X",
-        "detect-newline": "2.X",
-        "graceful-fs": "4.X",
-        "source-map": "~0.6.0",
-        "strip-bom-string": "1.X",
-        "through2": "2.X"
+        "@gulp-sourcemaps/identity-map": "^2.0.1",
+        "@gulp-sourcemaps/map-sources": "^1.0.0",
+        "acorn": "^6.4.1",
+        "convert-source-map": "^1.0.0",
+        "css": "^3.0.0",
+        "debug-fabulous": "^1.0.0",
+        "detect-newline": "^2.0.0",
+        "graceful-fs": "^4.0.0",
+        "source-map": "^0.6.0",
+        "strip-bom-string": "^1.0.0",
+        "through2": "^2.0.0"
       },
       "dependencies": {
         "acorn": {
-          "version": "5.7.4",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
-          "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
+          "version": "6.4.2",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.2.tgz",
+          "integrity": "sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==",
           "dev": true
         },
         "source-map": {
diff --git a/package.json b/package.json
index 41a62ba1..0963cc39 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
     "gulp-optimize-js": "^1.1.0",
     "gulp-rename": "^2.0.0",
     "gulp-sass": "^4.1.0",
-    "gulp-sourcemaps": "^2.6.5",
+    "gulp-sourcemaps": "^3.0.0",
     "gulp-standard": "^14.0.0",
     "gulp-svgmin": "^3.0.0",
     "gulp-uglify": "^3.0.2",