diff --git a/package.json b/package.json
index 75d2c973..bed50dd4 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "gulp-mail": "0.4.1",
     "gulp-rename": "2.0.0",
     "gulp-replace": "1.0.0",
-    "gulp-sourcemaps": "2.6.5",
+    "gulp-sourcemaps": "3.0.0",
     "gulp-uncss": "1.0.6",
     "gulp-zip": "5.0.2",
     "husky": "8.0.1",
diff --git a/yarn.lock b/yarn.lock
index f8e68423..72c245f2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -45,21 +45,21 @@
   resolved "https://registry.yarnpkg.com/@gar/promisify/-/promisify-1.1.3.tgz#555193ab2e3bb3b6adc3d551c9c030d9e860daf6"
   integrity sha512-k2Ty1JcVojjJFwrg/ThKi2ujJ7XNLYaFGNB/bWT9wGR+oSMJHMa5w+CUq6p/pVrKeNNgA7pCqEcjSnHVoqJQFw==
 
-"@gulp-sourcemaps/identity-map@1.X":
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/@gulp-sourcemaps/identity-map/-/identity-map-1.0.2.tgz#1e6fe5d8027b1f285dc0d31762f566bccd73d5a9"
-  integrity sha512-ciiioYMLdo16ShmfHBXJBOFm3xPC4AuwO4xeRpFeHz7WK9PYsWCmigagG2XyzZpubK4a3qNKoUBDhbzHfa50LQ==
+"@gulp-sourcemaps/identity-map@^2.0.1":
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/@gulp-sourcemaps/identity-map/-/identity-map-2.0.1.tgz#a6e8b1abec8f790ec6be2b8c500e6e68037c0019"
+  integrity sha512-Tb+nSISZku+eQ4X1lAkevcQa+jknn/OVUgZ3XCxEKIsLsqYuPoJwJOPQeaOk75X3WPftb29GWY1eqE7GLsXb1Q==
   dependencies:
-    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"
 
-"@gulp-sourcemaps/map-sources@1.X":
+"@gulp-sourcemaps/map-sources@^1.0.0":
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/@gulp-sourcemaps/map-sources/-/map-sources-1.0.0.tgz#890ae7c5d8c877f6d384860215ace9d7ec945bda"
-  integrity sha1-iQrnxdjId/bThIYCFazp1+yUW9o=
+  integrity sha512-o/EatdaGt8+x2qpb0vFLC/2Gug/xYPRXb6a+ET1wGYKozKN3krDWC/zZFZAtrzxJHuDL12mwdfEFKcKMNvc55A==
   dependencies:
     normalize-path "^2.0.1"
     through2 "^2.0.3"
@@ -409,16 +409,16 @@ acorn-globals@^1.0.4:
   dependencies:
     acorn "^2.1.0"
 
-acorn@5.X, acorn@^5.0.3:
-  version "5.7.4"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
-  integrity sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==
-
 acorn@^2.1.0, acorn@^2.4.0:
   version "2.7.0"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-2.7.0.tgz#ab6e7d9d886aaca8b085bc3312b79a198433f0e7"
   integrity sha1-q259nYhqrKiwhbwzEreaGYQz8Oc=
 
+acorn@^6.4.1:
+  version "6.4.2"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-6.4.2.tgz#35866fd710528e92de10cf06016498e47e39e1e6"
+  integrity sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==
+
 addressparser@~0.3.2:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/addressparser/-/addressparser-0.3.2.tgz#59873f35e8fcf6c7361c10239261d76e15348bb2"
@@ -2481,12 +2481,10 @@ content-disposition@^0.5.2:
   dependencies:
     safe-buffer "5.2.1"
 
-convert-source-map@1.X, convert-source-map@^1.1.1, convert-source-map@^1.5.0, convert-source-map@^1.5.1:
-  version "1.8.0"
-  resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-1.8.0.tgz#f3373c32d21b4d780dd8004514684fb791ca4369"
-  integrity sha512-+OQdjP49zViI/6i7nIJpA8rAl4sV/JdPfU9nZs3VqOwGIgizICvuN2ru6fMd+4llL0tar18UYJXfZ/TWtmhUjA==
-  dependencies:
-    safe-buffer "~5.1.1"
+convert-source-map@^1.0.0, convert-source-map@^1.1.1, convert-source-map@^1.5.0, convert-source-map@^1.5.1:
+  version "1.9.0"
+  resolved "https://registry.yarnpkg.com/convert-source-map/-/convert-source-map-1.9.0.tgz#7faae62353fb4213366d0ca98358d22e8368b05f"
+  integrity sha512-ASFBup0Mz1uyiIjANan1jzLQami9z1PoYSZCiiYW2FczPbenXc45FZdBZLzOT+r6+iciuEModtmCti+hjaAk0A==
 
 cookie@~0.4.1:
   version "0.4.2"
@@ -2663,7 +2661,7 @@ css-what@^6.0.1:
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-6.1.0.tgz#fb5effcf76f1ddea2c81bdfaa4de44e79bac70f4"
   integrity sha512-HTUrgRJ7r4dsZKU6GjmpfRK1O76h97Z8MfS1G0FozR+oF2kG6Vfe8JE6zwrkbxigziPHinCJ+gCPjA9EaBDtRw==
 
-css@2.X, css@^2.0.0, css@^2.2.1:
+css@^2.0.0:
   version "2.2.4"
   resolved "https://registry.yarnpkg.com/css/-/css-2.2.4.tgz#c646755c73971f2bba6a601e2cf2fd71b1298929"
   integrity sha512-oUnjmWpy0niI3x/mPL8dVEI1l7MnG3+HHyRPHf+YFSbK+svOhXpmSOcDURUh2aOCgl2grzrOPt1nHLuCVFULLw==
@@ -2673,6 +2671,15 @@ css@2.X, css@^2.0.0, css@^2.2.1:
     source-map-resolve "^0.5.2"
     urix "^0.1.0"
 
+css@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/css/-/css-3.0.0.tgz#4447a4d58fdd03367c516ca9f64ae365cee4aa5d"
+  integrity sha512-DG9pFfwOrzc+hawpmqX/dHYHJG+Bsdb0klhyi1sDneOgGOXy9wQIC8hzyVp1e4NRYDBdxcylvywPkkXCHAzTyQ==
+  dependencies:
+    inherits "^2.0.4"
+    source-map "^0.6.1"
+    source-map-resolve "^0.6.0"
+
 cssesc@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/cssesc/-/cssesc-3.0.0.tgz#37741919903b868565e1c09ea747445cd18983ee"
@@ -2748,7 +2755,7 @@ dateformat@^2.0.0:
   resolved "https://registry.yarnpkg.com/dateformat/-/dateformat-2.2.0.tgz#4065e2013cf9fb916ddfd82efb506ad4c6769062"
   integrity sha1-QGXiATz5+5Ft39gu+1Bq1MZ2kGI=
 
-debug-fabulous@1.X:
+debug-fabulous@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/debug-fabulous/-/debug-fabulous-1.1.0.tgz#af8a08632465224ef4174a9f06308c3c2a1ebc8e"
   integrity sha512-GZqvGIgKNlUnHUPQhepnUZFIMoi3dgZKQBzKDeL2g7oJF9SNAji/AAu36dusFUas0O+pae74lNeoIPHqXWDkLg==
@@ -2989,10 +2996,10 @@ detect-indent@^4.0.0:
   dependencies:
     repeating "^2.0.0"
 
-detect-newline@2.X:
+detect-newline@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/detect-newline/-/detect-newline-2.1.0.tgz#f41f1c10be4b00e87b5f13da680759f2c5bfd3e2"
-  integrity sha1-9B8cEL5LAOh7XxPaaAdZ8sW/0+I=
+  integrity sha512-CwffZFvlJffUg9zZA0uqrjQayUTC8ob94pnr5sFwaVv3IOmkfUHcWH+jXaQK3askE51Cqe8/9Ql/0uXNwqZ8Zg==
 
 dev-ip@^1.0.1:
   version "1.0.1"
@@ -4761,7 +4768,7 @@ got@^9.6.0:
     to-readable-stream "^1.0.0"
     url-parse-lax "^3.0.0"
 
-graceful-fs@*, graceful-fs@4.X, graceful-fs@^4.0.0, graceful-fs@^4.1.10, graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9, graceful-fs@^4.2.0, graceful-fs@^4.2.3, graceful-fs@^4.2.6, graceful-fs@^4.2.8:
+graceful-fs@*, graceful-fs@^4.0.0, graceful-fs@^4.1.10, graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.6, graceful-fs@^4.1.9, graceful-fs@^4.2.0, graceful-fs@^4.2.3, graceful-fs@^4.2.6, graceful-fs@^4.2.8:
   version "4.2.10"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.10.tgz#147d3a006da4ca3ce14728c7aefc287c367d7a6c"
   integrity sha512-9ByhssR2fPVsNZj478qUUbKfmL0+t5BDVyjShtyZZLiK7ZDAArFFfopyOTj0M05wE2tJPisA4iTnnXl2YoPvOA==
@@ -4947,22 +4954,22 @@ gulp-sourcemaps@1.6.0:
     through2 "^2.0.0"
     vinyl "^1.0.0"
 
-gulp-sourcemaps@2.6.5:
-  version "2.6.5"
-  resolved "https://registry.yarnpkg.com/gulp-sourcemaps/-/gulp-sourcemaps-2.6.5.tgz#a3f002d87346d2c0f3aec36af7eb873f23de8ae6"
-  integrity sha512-SYLBRzPTew8T5Suh2U8jCSDKY+4NARua4aqjj8HOysBh2tSgT9u4jc1FYirAdPx1akUxxDeK++fqw6Jg0LkQRg==
-  dependencies:
-    "@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@3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/gulp-sourcemaps/-/gulp-sourcemaps-3.0.0.tgz#2e154e1a2efed033c0e48013969e6f30337b2743"
+  integrity sha512-RqvUckJkuYqy4VaIH60RMal4ZtG0IbQ6PXMNkNsshEGJ9cldUPRb/YCgboYae+CLAs1HQNb4ADTKCx65HInquQ==
+  dependencies:
+    "@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"
 
 gulp-uncss@1.0.6:
   version "1.0.6"
@@ -8898,6 +8905,11 @@ pick-util@^1.0.1, pick-util@^1.1.4:
   dependencies:
     "@jonkemp/package-utils" "^1.0.7"
 
+picocolors@^0.2.1:
+  version "0.2.1"
+  resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-0.2.1.tgz#570670f793646851d1ba135996962abad587859f"
+  integrity sha512-cMlDqaLEqfSaW8Z7N5Jw+lyIW869EzT73/F5lhtY9cLGoVxSXznfgfXMO0Z5K0o0Q2TkTXq+0KFsdnSe3jDViA==
+
 picocolors@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/picocolors/-/picocolors-1.0.0.tgz#cb5bdc74ff3f51892236eaf79d68bc44564ab81c"
@@ -8983,6 +8995,14 @@ postcss-selector-parser@^6.0.10:
     cssesc "^3.0.0"
     util-deprecate "^1.0.2"
 
+postcss@^7.0.16:
+  version "7.0.39"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.39.tgz#9624375d965630e2e1f2c02a935c82a59cb48309"
+  integrity sha512-yioayjNbHn6z1/Bywyb2Y4s3yvDAeXGOyxqD+LnVOinq6Mdmd++SW2wUNVzavyyHxd6+DxzWGIuosg6P1Rj8uA==
+  dependencies:
+    picocolors "^0.2.1"
+    source-map "^0.6.1"
+
 postcss@~5.0.14:
   version "5.0.21"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-5.0.21.tgz#d4cf6f19774648c492ac57c298f6afb3c04caefe"
@@ -10339,6 +10359,14 @@ source-map-resolve@^0.5.0, source-map-resolve@^0.5.2:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
+source-map-resolve@^0.6.0:
+  version "0.6.0"
+  resolved "https://registry.yarnpkg.com/source-map-resolve/-/source-map-resolve-0.6.0.tgz#3d9df87e236b53f16d01e58150fc7711138e5ed2"
+  integrity sha512-KXBr9d/fO/bWo97NXsPIAW1bFSBOuCnjbNTBMO7N59hsv5i9yzRDfcYwwt0l04+VqnKC+EwzvJZIP/qkuMgR/w==
+  dependencies:
+    atob "^2.1.2"
+    decode-uri-component "^0.2.0"
+
 source-map-support@^0.4.15:
   version "0.4.18"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.4.18.tgz#0286a6de8be42641338594e97ccea75f0a2c585f"
@@ -10636,10 +10664,10 @@ strip-bom-stream@^1.0.0:
     first-chunk-stream "^1.0.0"
     strip-bom "^2.0.0"
 
-strip-bom-string@1.X:
+strip-bom-string@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/strip-bom-string/-/strip-bom-string-1.0.0.tgz#e5211e9224369fbb81d633a2f00044dc8cedad92"
-  integrity sha1-5SEekiQ2n7uB1jOi8ABE3IztrZI=
+  integrity sha512-uCC2VHvQRYu+lMh4My/sFNmF2klFymLX1wHJeXnbEJERpV/ZsVuonzerjfrGpIGF7LBVa1O7i9kjiWvJiFck8g==
 
 strip-bom@^2.0.0:
   version "2.0.0"
@@ -10969,14 +10997,6 @@ through2-filter@^3.0.0:
     through2 "~2.0.0"
     xtend "~4.0.0"
 
-through2@2.X, through2@^2.0.0, through2@^2.0.3, through2@~2.0.0:
-  version "2.0.5"
-  resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.5.tgz#01c1e39eb31d07cb7d03a96a70823260b23132cd"
-  integrity sha512-/mrRod8xqpA+IHSLyGCQ2s8SPHiCDEeQJSep1jqLYeEUClOFG2Qsh+4FU6G9VeqpZnGW/Su8LQGc4YKni5rYSQ==
-  dependencies:
-    readable-stream "~2.3.6"
-    xtend "~4.0.1"
-
 through2@^0.6.0, through2@^0.6.1:
   version "0.6.5"
   resolved "https://registry.yarnpkg.com/through2/-/through2-0.6.5.tgz#41ab9c67b29d57209071410e1d7a7a968cd3ad48"
@@ -10985,6 +11005,14 @@ through2@^0.6.0, through2@^0.6.1:
     readable-stream ">=1.0.33-1 <1.1.0-0"
     xtend ">=4.0.0 <4.1.0-0"
 
+through2@^2.0.0, through2@^2.0.3, through2@~2.0.0:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/through2/-/through2-2.0.5.tgz#01c1e39eb31d07cb7d03a96a70823260b23132cd"
+  integrity sha512-/mrRod8xqpA+IHSLyGCQ2s8SPHiCDEeQJSep1jqLYeEUClOFG2Qsh+4FU6G9VeqpZnGW/Su8LQGc4YKni5rYSQ==
+  dependencies:
+    readable-stream "~2.3.6"
+    xtend "~4.0.1"
+
 through2@^3.0.1:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/through2/-/through2-3.0.2.tgz#99f88931cfc761ec7678b41d5d7336b5b6a07bf4"