diff --git a/package-lock.json b/package-lock.json
index c5c8b47..1d2452a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,7 +8,7 @@
       "name": "common-lifecycle-enumeration",
       "version": "1.0.0-SNAPSHOT",
       "devDependencies": {
-        "ecmarkup": "^19.1.0",
+        "ecmarkup": "^20.0.0",
         "glob": "^7.1.6",
         "jsdom": "^15.0.0",
         "pagedjs": "^0.4.3",
@@ -1398,10 +1398,11 @@
       }
     },
     "node_modules/ecmarkup": {
-      "version": "19.1.0",
-      "resolved": "https://registry.npmjs.org/ecmarkup/-/ecmarkup-19.1.0.tgz",
-      "integrity": "sha512-+mh2vIcRCJtr8poJl64yulZkSSWpd7TQpORj+WVRmFe5omdS33eF94XjPa8QN0TiNz7gaCwJygKUF4COO142mA==",
+      "version": "20.0.0",
+      "resolved": "https://registry.npmjs.org/ecmarkup/-/ecmarkup-20.0.0.tgz",
+      "integrity": "sha512-c5Km5oVo+pZVvfaS1lRvaweVj89lkXxjOKGdW5QfQWFaAxHu/q1sSFCwEIy2bwhtZr5EiijdjonF22D/e75yzQ==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "chalk": "^4.1.2",
         "command-line-args": "^5.2.0",
@@ -1425,7 +1426,7 @@
         "emu-format": "bin/emu-format.js"
       },
       "engines": {
-        "node": ">= 12 || ^11.10.1 || ^10.13 || ^8.10"
+        "node": ">= 18"
       }
     },
     "node_modules/ecmarkup/node_modules/acorn": {
diff --git a/package.json b/package.json
index 19a5091..aea0246 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "author": "ECMA TC54",
   "homepage": "https://tc54.org/cle/",
   "devDependencies": {
-    "ecmarkup": "^19.1.0",
+    "ecmarkup": "^20.0.0",
     "glob": "^7.1.6",
     "jsdom": "^15.0.0",
     "pagedjs": "^0.4.3",