diff --git a/package-lock.json b/package-lock.json
index 9957764..3e57990 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
                 "markdown-it": "^14.1.0",
                 "markdown-it-anchor": "^9.0.1",
                 "markdown-it-attrs": "^4.1.6",
-                "markdown-it-footnote": "^3.0.3",
+                "markdown-it-footnote": "^4.0.0",
                 "markdown-it-mark": "^4.0.0",
                 "markdown-it-mathjax3": "^4.3.1",
                 "markdown-it-plantuml": "^1.4.1",
@@ -36,6 +36,9 @@
                 "html-minifier-terser": "^7.2.0",
                 "node-html-parser": "^6.1.13",
                 "sass": "^1.49.9"
+            },
+            "engines": {
+                "node": "22.x"
             }
         },
         "node_modules/@11ty/dependency-tree": {
@@ -934,8 +937,7 @@
         "node_modules/@types/linkify-it": {
             "version": "5.0.0",
             "resolved": "https://registry.npmjs.org/@types/linkify-it/-/linkify-it-5.0.0.tgz",
-            "integrity": "sha512-sVDA58zAw4eWAffKOaQH5/5j3XeayukzDk+ewSsnv3p4yJEZHCCzMDiZM8e0OUrRvmpGZ85jf4yDHkHsgBNr9Q==",
-            "peer": true
+            "integrity": "sha512-sVDA58zAw4eWAffKOaQH5/5j3XeayukzDk+ewSsnv3p4yJEZHCCzMDiZM8e0OUrRvmpGZ85jf4yDHkHsgBNr9Q=="
         },
         "node_modules/@types/markdown-it": {
             "version": "14.1.1",
@@ -950,8 +952,7 @@
         "node_modules/@types/mdurl": {
             "version": "2.0.0",
             "resolved": "https://registry.npmjs.org/@types/mdurl/-/mdurl-2.0.0.tgz",
-            "integrity": "sha512-RGdgjQUZba5p6QEFAVx2OGb8rQDL/cPRG7GiedRzMcJ1tYnUANBncjbSB1NRGwbvjcPeikRABz2nshyPk1bhWg==",
-            "peer": true
+            "integrity": "sha512-RGdgjQUZba5p6QEFAVx2OGb8rQDL/cPRG7GiedRzMcJ1tYnUANBncjbSB1NRGwbvjcPeikRABz2nshyPk1bhWg=="
         },
         "node_modules/@types/node": {
             "version": "17.0.45",
@@ -3334,6 +3335,7 @@
             "version": "14.1.0",
             "resolved": "https://registry.npmjs.org/markdown-it/-/markdown-it-14.1.0.tgz",
             "integrity": "sha512-a54IwgWPaeBCAAsv13YgmALOF1elABB08FxO9i+r4VFk5Vl4pKokRPeX8u5TCgSsPi6ec1otfLjdOpVcgbpshg==",
+            "peer": true,
             "dependencies": {
                 "argparse": "^2.0.1",
                 "entities": "^4.4.0",
@@ -3367,9 +3369,10 @@
             }
         },
         "node_modules/markdown-it-footnote": {
-            "version": "3.0.3",
-            "resolved": "https://registry.npmjs.org/markdown-it-footnote/-/markdown-it-footnote-3.0.3.tgz",
-            "integrity": "sha512-YZMSuCGVZAjzKMn+xqIco9d1cLGxbELHZ9do/TSYVzraooV8ypsppKNmUJ0fVH5ljkCInQAtFpm8Rb3eXSrt5w=="
+            "version": "4.0.0",
+            "resolved": "https://registry.npmjs.org/markdown-it-footnote/-/markdown-it-footnote-4.0.0.tgz",
+            "integrity": "sha512-WYJ7urf+khJYl3DqofQpYfEYkZKbmXmwxQV8c8mO/hGIhgZ1wOe7R4HLFNwqx7TjILbnC98fuyeSsin19JdFcQ==",
+            "license": "MIT"
         },
         "node_modules/markdown-it-mark": {
             "version": "4.0.0",
@@ -4168,6 +4171,7 @@
             "resolved": "https://registry.npmjs.org/posthtml/-/posthtml-0.16.6.tgz",
             "integrity": "sha512-JcEmHlyLK/o0uGAlj65vgg+7LIms0xKXe60lcDOTU7oVX/3LuEuLwrQpW3VJ7de5TaFKiW4kWkaIpJL42FEgxQ==",
             "dev": true,
+            "peer": true,
             "dependencies": {
                 "posthtml-parser": "^0.11.0",
                 "posthtml-render": "^3.0.0"
@@ -5136,6 +5140,7 @@
             "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
             "dev": true,
             "license": "MIT",
+            "peer": true,
             "engines": {
                 "node": ">=12"
             },
diff --git a/package.json b/package.json
index 584bbd5..b06d0b9 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
         "markdown-it": "^14.1.0",
         "markdown-it-anchor": "^9.0.1",
         "markdown-it-attrs": "^4.1.6",
-        "markdown-it-footnote": "^3.0.3",
+        "markdown-it-footnote": "^4.0.0",
         "markdown-it-mark": "^4.0.0",
         "markdown-it-mathjax3": "^4.3.1",
         "markdown-it-plantuml": "^1.4.1",