diff --git a/package.json b/package.json
index d5dc7a49..eb198fc8 100644
--- a/package.json
+++ b/package.json
@@ -39,12 +39,12 @@
     "eslint-plugin-vue-libs": "^3.0.0",
     "fast-glob": "^2.2.2",
     "fast-vue-md-loader": "^1.0.3",
-    "fs-extra": "^4.0.2",
+    "fs-extra": "^7.0.0",
     "gh-pages": "^1.1.0",
     "gulp": "^3.9.1",
     "gulp-babel": "^7.0.1",
     "gulp-clean-css": "^3.9.0",
-    "gulp-postcss": "^7.0.0",
+    "gulp-postcss": "^8.0.0",
     "gulp-remove-logging": "^1.2.0",
     "gulp-rename": "^1.2.2",
     "gulp-util": "^3.0.8",
@@ -52,13 +52,13 @@
     "node-watch": "^0.5.5",
     "postcss-calc": "^6.0.1",
     "postcss-easy-import": "^3.0.0",
-    "postcss-loader": "^2.1.6",
+    "postcss-loader": "^3.0.0",
     "precss": "^2.0.0",
     "progress-bar-webpack-plugin": "^1.11.0",
-    "shelljs": "^0.7.8",
+    "shelljs": "^0.8.2",
     "style-loader": "^0.22.1",
     "url-loader": "^1.0.1",
-    "vant-doc": "^1.0.11",
+    "vant-doc": "^1.0.12",
     "vue": "2.5.17",
     "vue-loader": "^15.2.6",
     "vue-router": "^3.0.1",
diff --git a/yarn.lock b/yarn.lock
index 4b83f412..768d3ed1 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -335,6 +335,10 @@ acorn@^5.0.0, acorn@^5.0.3, acorn@^5.5.0, acorn@^5.6.0, acorn@^5.6.2:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.1.tgz#f095829297706a7c9776958c0afc8930a9b9d9d8"
 
+ajv-errors@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/ajv-errors/-/ajv-errors-1.0.0.tgz#ecf021fa108fd17dfb5e6b383f2dd233e31ffc59"
+
 ajv-keywords@^3.0.0, ajv-keywords@^3.1.0:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.2.0.tgz#e86b819c602cf8821ad637413698f1dec021847a"
@@ -360,12 +364,6 @@ ansi-colors@^1.0.1:
   dependencies:
     ansi-wrap "^0.1.0"
 
-ansi-cyan@^0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/ansi-cyan/-/ansi-cyan-0.1.1.tgz#538ae528af8982f28ae30d86f2f17456d2609873"
-  dependencies:
-    ansi-wrap "0.1.0"
-
 ansi-escapes@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-3.1.0.tgz#f73207bb81207d75fd6c83f125af26eea378ca30"
@@ -376,12 +374,6 @@ ansi-gray@^0.1.1:
   dependencies:
     ansi-wrap "0.1.0"
 
-ansi-red@^0.1.1:
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/ansi-red/-/ansi-red-0.1.1.tgz#8c638f9d1080800a353c9c28c8a81ca4705d946c"
-  dependencies:
-    ansi-wrap "0.1.0"
-
 ansi-regex@^2.0.0:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-2.1.1.tgz#c3b33ab5ee360d86e0e628f0468ae7ef27d654df"
@@ -451,13 +443,6 @@ argparse@^1.0.7:
   dependencies:
     sprintf-js "~1.0.2"
 
-arr-diff@^1.0.1:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-1.1.0.tgz#687c32758163588fef7de7b36fabe495eb1a399a"
-  dependencies:
-    arr-flatten "^1.0.1"
-    array-slice "^0.2.3"
-
 arr-diff@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/arr-diff/-/arr-diff-2.0.0.tgz#8f3b827f955a8bd669697e4a4256ac3ceae356cf"
@@ -472,10 +457,6 @@ arr-flatten@^1.0.1, arr-flatten@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/arr-flatten/-/arr-flatten-1.1.0.tgz#36048bbff4e7b47e136644316c99669ea5ae91f1"
 
-arr-union@^2.0.1:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/arr-union/-/arr-union-2.1.0.tgz#20f9eab5ec70f5c7d215b1077b1c39161d292c7d"
-
 arr-union@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/arr-union/-/arr-union-3.1.0.tgz#e39b09aea9def866a8f206e288af63919bae39c4"
@@ -492,10 +473,6 @@ array-find-index@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/array-find-index/-/array-find-index-1.0.2.tgz#df010aa1287e164bbda6f9723b0a96a1ec4187a1"
 
-array-slice@^0.2.3:
-  version "0.2.3"
-  resolved "https://registry.yarnpkg.com/array-slice/-/array-slice-0.2.3.tgz#dd3cfb80ed7973a75117cdac69b0b99ec86186f5"
-
 array-slice@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/array-slice/-/array-slice-1.1.0.tgz#e368ea15f89bc7069f7ffb89aec3a6c7d4ac22d4"
@@ -1870,18 +1847,6 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-cosmiconfig@^2.1.0, cosmiconfig@^2.1.1:
-  version "2.2.2"
-  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-2.2.2.tgz#6173cebd56fac042c1f4390edf7af6c07c7cb892"
-  dependencies:
-    is-directory "^0.3.1"
-    js-yaml "^3.4.3"
-    minimist "^1.2.0"
-    object-assign "^4.1.0"
-    os-homedir "^1.0.1"
-    parse-json "^2.2.0"
-    require-from-string "^1.1.0"
-
 cosmiconfig@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-4.0.0.tgz#760391549580bbd2df1e562bc177b13c290972dc"
@@ -2585,12 +2550,6 @@ expand-tilde@^2.0.0, expand-tilde@^2.0.2:
   dependencies:
     homedir-polyfill "^1.0.1"
 
-extend-shallow@^1.1.2:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-1.1.4.tgz#19d6bf94dfc09d76ba711f39b872d21ff4dd9071"
-  dependencies:
-    kind-of "^1.1.0"
-
 extend-shallow@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/extend-shallow/-/extend-shallow-2.0.1.tgz#51af7d614ad9a9f610ea1bafbb989d6b1c56890f"
@@ -2871,6 +2830,14 @@ fs-extra@^5.0.0:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
+fs-extra@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-7.0.0.tgz#8cc3f47ce07ef7b3593a11b9fb245f7e34c041d6"
+  dependencies:
+    graceful-fs "^4.1.2"
+    jsonfile "^4.0.0"
+    universalify "^0.1.0"
+
 fs-minipass@^1.2.5:
   version "1.2.5"
   resolved "https://registry.yarnpkg.com/fs-minipass/-/fs-minipass-1.2.5.tgz#06c277218454ec288df77ada54a03b8702aacb9d"
@@ -3150,14 +3117,14 @@ gulp-clean-css@^3.9.0:
     through2 "2.0.3"
     vinyl-sourcemaps-apply "0.2.1"
 
-gulp-postcss@^7.0.0:
-  version "7.0.1"
-  resolved "https://registry.yarnpkg.com/gulp-postcss/-/gulp-postcss-7.0.1.tgz#3f1c36db1197140c399c252ddff339129638e395"
+gulp-postcss@^8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/gulp-postcss/-/gulp-postcss-8.0.0.tgz#8d3772cd4d27bca55ec8cb4c8e576e3bde4dc550"
   dependencies:
     fancy-log "^1.3.2"
-    plugin-error "^0.1.2"
-    postcss "^6.0.0"
-    postcss-load-config "^1.2.0"
+    plugin-error "^1.0.1"
+    postcss "^7.0.2"
+    postcss-load-config "^2.0.0"
     vinyl-sourcemaps-apply "^0.2.1"
 
 gulp-remove-logging@^1.2.0:
@@ -3891,7 +3858,7 @@ js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
 
-js-yaml@^3.11.0, js-yaml@^3.4.3, js-yaml@^3.9.0:
+js-yaml@^3.11.0, js-yaml@^3.9.0:
   version "3.12.0"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.12.0.tgz#eaed656ec8344f10f527c6bfa1b6e2244de167d1"
   dependencies:
@@ -3944,10 +3911,6 @@ killable@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/killable/-/killable-1.0.0.tgz#da8b84bd47de5395878f95d64d02f2449fe05e6b"
 
-kind-of@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-1.1.0.tgz#140a3d2d41a36d2efcfa9377b62c24f8495a5c44"
-
 kind-of@^3.0.2, kind-of@^3.0.3, kind-of@^3.2.0:
   version "3.2.2"
   resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-3.2.2.tgz#31ea21a734bab9bbb0f32466d893aea51e4a3c64"
@@ -4966,7 +4929,7 @@ os-browserify@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/os-browserify/-/os-browserify-0.3.0.tgz#854373c7f5c2315914fc9bfc6bd8238fdda1ec27"
 
-os-homedir@^1.0.0, os-homedir@^1.0.1:
+os-homedir@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
 
@@ -5232,16 +5195,6 @@ plugin-error@1.0.1, plugin-error@^1.0.1:
     arr-union "^3.1.0"
     extend-shallow "^3.0.2"
 
-plugin-error@^0.1.2:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/plugin-error/-/plugin-error-0.1.2.tgz#3b9bb3335ccf00f425e07437e19276967da47ace"
-  dependencies:
-    ansi-cyan "^0.1.1"
-    ansi-red "^0.1.1"
-    arr-diff "^1.0.1"
-    arr-union "^2.0.1"
-    extend-shallow "^1.1.2"
-
 pluralize@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/pluralize/-/pluralize-7.0.0.tgz#298b89df8b93b0221dbf421ad2b1b1ea23fc6777"
@@ -5336,15 +5289,6 @@ postcss-js@^1.0.1:
     camelcase-css "^1.0.1"
     postcss "^6.0.11"
 
-postcss-load-config@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/postcss-load-config/-/postcss-load-config-1.2.0.tgz#539e9afc9ddc8620121ebf9d8c3673e0ce50d28a"
-  dependencies:
-    cosmiconfig "^2.1.0"
-    object-assign "^4.1.0"
-    postcss-load-options "^1.2.0"
-    postcss-load-plugins "^2.3.0"
-
 postcss-load-config@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/postcss-load-config/-/postcss-load-config-2.0.0.tgz#f1312ddbf5912cd747177083c5ef7a19d62ee484"
@@ -5352,28 +5296,14 @@ postcss-load-config@^2.0.0:
     cosmiconfig "^4.0.0"
     import-cwd "^2.0.0"
 
-postcss-load-options@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/postcss-load-options/-/postcss-load-options-1.2.0.tgz#b098b1559ddac2df04bc0bb375f99a5cfe2b6d8c"
-  dependencies:
-    cosmiconfig "^2.1.0"
-    object-assign "^4.1.0"
-
-postcss-load-plugins@^2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/postcss-load-plugins/-/postcss-load-plugins-2.3.0.tgz#745768116599aca2f009fad426b00175049d8d92"
-  dependencies:
-    cosmiconfig "^2.1.1"
-    object-assign "^4.1.0"
-
-postcss-loader@^2.1.6:
-  version "2.1.6"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-2.1.6.tgz#1d7dd7b17c6ba234b9bed5af13e0bea40a42d740"
+postcss-loader@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-3.0.0.tgz#6b97943e47c72d845fa9e03f273773d4e8dd6c2d"
   dependencies:
     loader-utils "^1.1.0"
-    postcss "^6.0.0"
+    postcss "^7.0.0"
     postcss-load-config "^2.0.0"
-    schema-utils "^0.4.0"
+    schema-utils "^1.0.0"
 
 postcss-media-minmax@^3.0.0:
   version "3.0.0"
@@ -5507,7 +5437,7 @@ postcss@^6.0.0, postcss@^6.0.1, postcss@^6.0.11, postcss@^6.0.13, postcss@^6.0.1
     source-map "^0.6.1"
     supports-color "^5.4.0"
 
-postcss@^7.0.2:
+postcss@^7.0.0, postcss@^7.0.2:
   version "7.0.2"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-7.0.2.tgz#7b5a109de356804e27f95a960bef0e4d5bc9bb18"
   dependencies:
@@ -5922,10 +5852,6 @@ require-directory@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/require-directory/-/require-directory-2.1.1.tgz#8c64ad5fd30dab1c976e2344ffe7f792a6a6df42"
 
-require-from-string@^1.1.0:
-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/require-from-string/-/require-from-string-1.2.1.tgz#529c9ccef27380adfec9a2f965b649bbee636418"
-
 require-from-string@^2.0.1:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/require-from-string/-/require-from-string-2.0.2.tgz#89a7fdd938261267318eafe14f9c32e598c36909"
@@ -6049,13 +5975,21 @@ sax@^1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
 
-schema-utils@^0.4.0, schema-utils@^0.4.3, schema-utils@^0.4.4, schema-utils@^0.4.5:
+schema-utils@^0.4.3, schema-utils@^0.4.4, schema-utils@^0.4.5:
   version "0.4.7"
   resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-0.4.7.tgz#ba74f597d2be2ea880131746ee17d0a093c68187"
   dependencies:
     ajv "^6.1.0"
     ajv-keywords "^3.1.0"
 
+schema-utils@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-1.0.0.tgz#0b79a93204d7b600d4b2850d1f66c2a34951c770"
+  dependencies:
+    ajv "^6.1.0"
+    ajv-errors "^1.0.0"
+    ajv-keywords "^3.1.0"
+
 semver-diff@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/semver-diff/-/semver-diff-2.1.0.tgz#4bbb8437c8d37e4b0cf1a68fd726ec6d645d6d36"
@@ -6129,9 +6063,9 @@ shebang-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
 
-shelljs@^0.7.8:
-  version "0.7.8"
-  resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.7.8.tgz#decbcf874b0d1e5fb72e14b164a9683048e9acb3"
+shelljs@^0.8.2:
+  version "0.8.2"
+  resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.8.2.tgz#345b7df7763f4c2340d584abb532c5f752ca9e35"
   dependencies:
     glob "^7.0.0"
     interpret "^1.0.0"
@@ -6827,9 +6761,9 @@ validate-npm-package-license@^3.0.1:
     spdx-correct "^3.0.0"
     spdx-expression-parse "^3.0.0"
 
-vant-doc@^1.0.11:
-  version "1.0.11"
-  resolved "https://registry.yarnpkg.com/vant-doc/-/vant-doc-1.0.11.tgz#b53b8bae343dfad42d1b0b640e0fdc12cac1fb50"
+vant-doc@^1.0.12:
+  version "1.0.12"
+  resolved "https://registry.yarnpkg.com/vant-doc/-/vant-doc-1.0.12.tgz#155807b1a3ef96a44cc4b0d38644d48eca0b25a1"
   dependencies:
     cheerio "0.22.0"
     commander "^2.17.1"