diff --git a/package-lock.json b/package-lock.json
index 40b45c9..88541e2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
         "highlight.js": "^11.11.1",
         "jquery": "^4.0.0",
         "medium-zoom": "^1.1.0",
-        "npm-check-updates": "20.0.2"
+        "npm-check-updates": "21.0.0"
       },
       "devDependencies": {
         "@asciidoctor/core": "^3.0.4",
@@ -7713,17 +7713,17 @@
       }
     },
     "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==",
       "license": "Apache-2.0",
       "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/nth-check": {
diff --git a/package.json b/package.json
index 2dbdfde..c6c6448 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "highlight.js": "^11.11.1",
     "jquery": "^4.0.0",
     "medium-zoom": "^1.1.0",
-    "npm-check-updates": "20.0.2"
+    "npm-check-updates": "21.0.0"
   },
   "devDependencies": {
     "@asciidoctor/core": "^3.0.4",