diff --git a/package-lock.json b/package-lock.json
index 456486e..1af4348 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
         "gulp-strip-css-comments": "^3.0.0",
         "gulp-uglify": "^3.0.2",
         "lint-staged": "^16.4.0",
-        "npm-check-updates": "^20.0.2",
+        "npm-check-updates": "^21.0.0",
         "prettier-standard": "^16.4.1",
         "sass": "^1.99.0",
         "standard": "^17.1.2",
@@ -11821,17 +11821,17 @@
       }
     },
     "node_modules/npm-check-updates": {
-      "version": "20.0.2",
-      "resolved": "https://registry.npmjs.org/npm-check-updates/-/npm-check-updates-20.0.2.tgz",
-      "integrity": "sha512-nvbcXiprjMOoSX0FCHC41kjpZhNFURV53KMU0MMa0U10RPHeoHpiilMg2P8g9NLSQoo0umSH77tUqHWTOH3w7A==",
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/npm-check-updates/-/npm-check-updates-21.0.0.tgz",
+      "integrity": "sha512-iGFLoW1QWsEDLR6Cnklyk+iHTf20hS84o79idR6AKhjSwk0whMdCd5FS0bTgEe6gMrRnJ0fGr2P6BEZ2zOelYg==",
       "dev": true,
       "bin": {
         "ncu": "build/cli.js",
         "npm-check-updates": "build/cli.js"
       },
       "engines": {
-        "node": ">=20.0.0",
-        "npm": ">=8.12.1"
+        "node": "^20.19.0 || ^22.12.0 || >=24.0.0",
+        "npm": ">=10.0.0"
       }
     },
     "node_modules/num2fraction": {
@@ -27877,9 +27877,9 @@
       }
     },
     "npm-check-updates": {
-      "version": "20.0.2",
-      "resolved": "https://registry.npmjs.org/npm-check-updates/-/npm-check-updates-20.0.2.tgz",
-      "integrity": "sha512-nvbcXiprjMOoSX0FCHC41kjpZhNFURV53KMU0MMa0U10RPHeoHpiilMg2P8g9NLSQoo0umSH77tUqHWTOH3w7A==",
+      "version": "21.0.0",
+      "resolved": "https://registry.npmjs.org/npm-check-updates/-/npm-check-updates-21.0.0.tgz",
+      "integrity": "sha512-iGFLoW1QWsEDLR6Cnklyk+iHTf20hS84o79idR6AKhjSwk0whMdCd5FS0bTgEe6gMrRnJ0fGr2P6BEZ2zOelYg==",
       "dev": true
     },
     "num2fraction": {
diff --git a/package.json b/package.json
index 5328ec9..1f77ab2 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,7 @@
     "gulp-strip-css-comments": "^3.0.0",
     "gulp-uglify": "^3.0.2",
     "lint-staged": "^16.4.0",
-    "npm-check-updates": "^20.0.2",
+    "npm-check-updates": "^21.0.0",
     "prettier-standard": "^16.4.1",
     "sass": "^1.99.0",
     "standard": "^17.1.2",
diff --git a/yarn.lock b/yarn.lock
index 0afa6c9..15baf81 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -6649,10 +6649,10 @@ now-and-later@^3.0.0:
   dependencies:
     once "^1.4.0"
 
-npm-check-updates@^20.0.2:
-  version "20.0.2"
-  resolved "https://registry.yarnpkg.com/npm-check-updates/-/npm-check-updates-20.0.2.tgz#022994d62265c7ef3bac8ab6988865022f2dcf7f"
-  integrity sha512-nvbcXiprjMOoSX0FCHC41kjpZhNFURV53KMU0MMa0U10RPHeoHpiilMg2P8g9NLSQoo0umSH77tUqHWTOH3w7A==
+npm-check-updates@^21.0.0:
+  version "21.0.0"
+  resolved "https://registry.yarnpkg.com/npm-check-updates/-/npm-check-updates-21.0.0.tgz#b20da1f2084444beb4819256edfd085dc3c3a67b"
+  integrity sha512-iGFLoW1QWsEDLR6Cnklyk+iHTf20hS84o79idR6AKhjSwk0whMdCd5FS0bTgEe6gMrRnJ0fGr2P6BEZ2zOelYg==
 
 npm-run-path@^3.0.0:
   version "3.1.0"