diff --git a/doc/package-lock.json b/doc/package-lock.json
index 08258ae..5367fe6 100644
--- a/doc/package-lock.json
+++ b/doc/package-lock.json
@@ -8,7 +8,7 @@
         "markdownlint-cli2": "0.13.0"
       },
       "engines": {
-        "node": ">=18.0.0"
+        "node": ">=20.0.0"
       }
     },
     "node_modules/@nodelib/fs.scandir": {
diff --git a/doc/package.json b/doc/package.json
index 2582c0e..7461d7c 100644
--- a/doc/package.json
+++ b/doc/package.json
@@ -2,7 +2,7 @@
   "$schema": "https://json.schemastore.org/package.json",
   "private": true,
   "engines": {
-    "node": ">=18.0.0"
+    "node": ">=20.0.0"
   },
   "devDependencies": {
     "markdownlint-cli2": "0.13.0"