diff --git a/package-lock.json b/package-lock.json
index 639e626..ef99aa7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "devDependencies": {
         "@tc39/ecma262-biblio": "2.1.2663",
-        "ecmarkup": "18.1.0",
+        "ecmarkup": "18.3.1",
         "typescript": "5.2.2"
       }
     },
@@ -591,9 +591,9 @@
       }
     },
     "node_modules/ecmarkup": {
-      "version": "18.1.0",
-      "resolved": "https://registry.npmjs.org/ecmarkup/-/ecmarkup-18.1.0.tgz",
-      "integrity": "sha512-0ngQ2YYizUkswKZcCn8g8BlCoaEAN8R2DOZfupk0k2lnIWzUZJNxjld4lt97YTJxcZxVTMERmukZ8svBSz9UcQ==",
+      "version": "18.3.1",
+      "resolved": "https://registry.npmjs.org/ecmarkup/-/ecmarkup-18.3.1.tgz",
+      "integrity": "sha512-ouyfwgVjtvyF9AdAQnI9krCWNE5srK90XGPym8vs6WPtjUso6Pq887DwAYBDbga9lrfwezWo5n8hGu9amYYu1g==",
       "dev": true,
       "dependencies": {
         "chalk": "^4.1.2",
@@ -603,7 +603,7 @@
         "ecmarkdown": "^8.1.0",
         "eslint-formatter-codeframe": "^7.32.1",
         "fast-glob": "^3.2.7",
-        "grammarkdown": "^3.2.0",
+        "grammarkdown": "^3.3.2",
         "highlight.js": "11.0.1",
         "html-escape": "^1.0.2",
         "js-yaml": "^3.13.1",