diff --git a/demo/package.json b/demo/package.json
index d1989a6c..9dd528e2 100644
--- a/demo/package.json
+++ b/demo/package.json
@@ -23,7 +23,7 @@
     "eslint-plugin-vue": "^7.13.0",
     "prettier": "^2.3.2",
     "sass": "^1.35.2",
-    "sass-loader": "^10.1.0",
+    "sass-loader": "^13.1.0",
     "typescript": "~4.3.5",
     "vue-cli-plugin-vuetify": "^2.0.8",
     "vue-template-compiler": "^2.6.14",
diff --git a/demo/yarn.lock b/demo/yarn.lock
index 3e0c55e7..c5429b0b 100644
--- a/demo/yarn.lock
+++ b/demo/yarn.lock
@@ -188,11 +188,6 @@
   resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.5.tgz#dcce4430e64b443ba8945f0290fb564ad5bac6dd"
   integrity sha512-7+2BITlgjgDhH0vvwZU/HZJVyk+2XUlvxXe8dFMedNX/aMkaOq++rMAFXc0tM7ij15QaWlbdQASBR9dihi+bDQ==
 
-"@types/json-schema@^7.0.6":
-  version "7.0.6"
-  resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.6.tgz#f4c7ec43e81b319a9815115031709f26987891f0"
-  integrity sha512-3c+yGKvVP5Y9TYBEibGNR+kLtijnj7mYrXRg+WpFb2X9xm04g/DXYkfg4hmzJQosc9snFNUPkbYIhu+KAm6jJw==
-
 "@types/mime@*":
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.3.tgz#c893b73721db73699943bfc3653b1deb7faa4a3a"
@@ -721,7 +716,7 @@ ajv-keywords@^3.5.2:
   resolved "https://registry.yarnpkg.com/ajv-keywords/-/ajv-keywords-3.5.2.tgz#31f29da5ab6e00d1c2d329acf7b5929614d5014d"
   integrity sha512-5p6WTN0DdTGVQk6VjcEju19IgaHudalcfabD7yhDGeA6bcQnmL+CpveLJq/3hvfwd1aof6L386Ougkx6RfyMIQ==
 
-ajv@^6.1.0, ajv@^6.10.0, ajv@^6.10.2, ajv@^6.12.2, ajv@^6.12.4, ajv@^6.12.5, ajv@^6.5.5:
+ajv@^6.1.0, ajv@^6.10.0, ajv@^6.10.2, ajv@^6.12.2, ajv@^6.12.4, ajv@^6.5.5:
   version "6.12.6"
   resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.6.tgz#baf5a62e802b07d977034586f8c3baf5adf26df4"
   integrity sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==
@@ -6290,16 +6285,13 @@ safe-regex@^1.1.0:
   resolved "https://registry.npm.taobao.org/safer-buffer/download/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
   integrity sha1-RPoWGwGHuVSd2Eu5GAL5vYOFzWo=
 
-sass-loader@^10.1.0:
-  version "10.1.0"
-  resolved "https://registry.yarnpkg.com/sass-loader/-/sass-loader-10.1.0.tgz#1727fcc0c32ab3eb197cda61d78adf4e9174a4b3"
-  integrity sha512-ZCKAlczLBbFd3aGAhowpYEy69Te3Z68cg8bnHHl6WnSCvnKpbM6pQrz957HWMa8LKVuhnD9uMplmMAHwGQtHeg==
+sass-loader@^13.1.0:
+  version "13.1.0"
+  resolved "https://registry.yarnpkg.com/sass-loader/-/sass-loader-13.1.0.tgz#e5b9acf14199a9bc6eaed7a0b8b23951c2cebf6f"
+  integrity sha512-tZS1RJQ2n2+QNyf3CCAo1H562WjL/5AM6Gi8YcPVVoNxQX8d19mx8E+8fRrMWsyc93ZL6Q8vZDSM0FHVTJaVnQ==
   dependencies:
     klona "^2.0.4"
-    loader-utils "^2.0.0"
     neo-async "^2.6.2"
-    schema-utils "^3.0.0"
-    semver "^7.3.2"
 
 sass@^1.35.2:
   version "1.35.2"
@@ -6340,15 +6332,6 @@ schema-utils@^2.0.0, schema-utils@^2.5.0, schema-utils@^2.6.6:
     ajv "^6.12.4"
     ajv-keywords "^3.5.2"
 
-schema-utils@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-3.0.0.tgz#67502f6aa2b66a2d4032b4279a2944978a0913ef"
-  integrity sha512-6D82/xSzO094ajanoOSbe4YvXWMfn2A//8Y1+MUqFAJul5Bs+yn36xbK9OtNDcRVSBJ9jjeoXftM6CfztsjOAA==
-  dependencies:
-    "@types/json-schema" "^7.0.6"
-    ajv "^6.12.5"
-    ajv-keywords "^3.5.2"
-
 select-hose@^2.0.0:
   version "2.0.0"
   resolved "https://registry.npm.taobao.org/select-hose/download/select-hose-2.0.0.tgz#625d8658f865af43ec962bfc376a37359a4994ca"