diff --git a/package.json b/package.json
index 02c7f396e..686efe847 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "@vuepress/plugin-back-to-top": "^2.0.0-beta.25",
     "@vuepress/plugin-debug": "^2.0.0-beta.25",
     "@vuepress/plugin-search": "^2.0.0-beta.25",
-    "postcss-loader": "^7.0.0",
+    "postcss-loader": "^7.1.0",
     "prettier": "^2.8.0",
     "sass": "^1.51.0",
     "sass-loader": "^13.2.0",
diff --git a/yarn.lock b/yarn.lock
index 7899c72e7..03b383fe4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1449,6 +1449,16 @@ cosmiconfig@^7.0.0:
     path-type "^4.0.0"
     yaml "^1.10.0"
 
+cosmiconfig@^8.0.0:
+  version "8.1.0"
+  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-8.1.0.tgz#947e174c796483ccf0a48476c24e4fefb7e1aea8"
+  integrity sha512-0tLZ9URlPGU7JsKq0DQOQ3FoRsYX8xDZ7xMiATQfaiGMz7EHowNkbU9u1coAOmnh9p/1ySpm0RB3JNWRXM5GCg==
+  dependencies:
+    import-fresh "^3.2.1"
+    js-yaml "^4.1.0"
+    parse-json "^5.0.0"
+    path-type "^4.0.0"
+
 cross-spawn@^7.0.3:
   version "7.0.3"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-7.0.3.tgz#f73a85b9d5d41d045551c177e2882d4ac85728a6"
@@ -3103,6 +3113,13 @@ js-yaml@^3.13.1:
     argparse "^1.0.7"
     esprima "^4.0.0"
 
+js-yaml@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.1.0.tgz#c1fb65f8f5017901cdd2c951864ba18458a10602"
+  integrity sha512-wpxZs9NoxZaJESJGIZTyDEaYpl0FKSA+FB9aJiyemKhMwkxQg63h4T1KJgUGHpTqPDNRcmmYLugrRjJlBtWvRA==
+  dependencies:
+    argparse "^2.0.1"
+
 json-parse-better-errors@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz#bb867cfb3450e69107c131d1c514bab3dc8bcaa9"
@@ -3156,10 +3173,10 @@ kind-of@^6.0.0, kind-of@^6.0.2:
   resolved "https://registry.yarnpkg.com/kind-of/-/kind-of-6.0.3.tgz#07c05034a6c349fa06e24fa35aa76db4580ce4dd"
   integrity sha512-dcS1ul+9tmeD95T+x28/ehLgd9mENa3LsvDTtzm3vyBEO7RPptvAD+t44WVXaUjTBRcrpFeFlC8WCruUR456hw==
 
-klona@^2.0.4, klona@^2.0.5:
-  version "2.0.5"
-  resolved "https://registry.yarnpkg.com/klona/-/klona-2.0.5.tgz#d166574d90076395d9963aa7a928fabb8d76afbc"
-  integrity sha512-pJiBpiXMbt7dkzXe8Ghj/u4FfXOOa98fPW+bihOJ4SjnoijweJrNThJfd3ifXpXhREjpoF2mZVH1GfS9LV3kHQ==
+klona@^2.0.4, klona@^2.0.6:
+  version "2.0.6"
+  resolved "https://registry.yarnpkg.com/klona/-/klona-2.0.6.tgz#85bffbf819c03b2f53270412420a4555ef882e22"
+  integrity sha512-dhG34DXATL5hSxJbIexCft8FChFXtmskoZYnoPWjXQuebWYCNkVeV3KkGegCK9CP1oswI/vQibS2GY7Em/sJJA==
 
 layout-base@^1.0.0:
   version "1.0.2"
@@ -3764,14 +3781,14 @@ postcss-loader@^6.1.1:
     klona "^2.0.4"
     semver "^7.3.5"
 
-postcss-loader@^7.0.0:
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-7.0.0.tgz#367d10eb1c5f1d93700e6b399683a6dc7c3af396"
-  integrity sha512-IDyttebFzTSY6DI24KuHUcBjbAev1i+RyICoPEWcAstZsj03r533uMXtDn506l6/wlsRYiS5XBdx7TpccCsyUg==
+postcss-loader@^7.1.0:
+  version "7.1.0"
+  resolved "https://registry.yarnpkg.com/postcss-loader/-/postcss-loader-7.1.0.tgz#3ba0dfddff06043f3eac7690a1d8b432264bb866"
+  integrity sha512-vTD2DJ8vJD0Vr1WzMQkRZWRjcynGh3t7NeoLg+Sb1TeuK7etiZfL/ZwHbaVa3M+Qni7Lj/29voV9IggnIUjlIw==
   dependencies:
-    cosmiconfig "^7.0.0"
-    klona "^2.0.5"
-    semver "^7.3.7"
+    cosmiconfig "^8.0.0"
+    klona "^2.0.6"
+    semver "^7.3.8"
 
 postcss-modules-extract-imports@^3.0.0:
   version "3.0.0"
@@ -4136,10 +4153,10 @@ selfsigned@^1.10.11:
   dependencies:
     node-forge "^0.10.0"
 
-semver@^7.3.5, semver@^7.3.7:
-  version "7.3.7"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.7.tgz#12c5b649afdbf9049707796e22a4028814ce523f"
-  integrity sha512-QlYTucUYOews+WeEujDoEGziz4K6c47V/Bd+LjSSYcA94p+DmINdf7ncaUinThfvZyu13lN9OY1XDxt8C0Tw0g==
+semver@^7.3.5, semver@^7.3.8:
+  version "7.3.8"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.8.tgz#07a78feafb3f7b32347d725e33de7e2a2df67798"
+  integrity sha512-NB1ctGL5rlHrPJtFDVIVzTyQylMLu9N9VICA6HSFJo8MCGVTMW6gfpicwKmmK/dAjTOrqu5l63JJOpDSrAis3A==
   dependencies:
     lru-cache "^6.0.0"