diff --git a/package-lock.json b/package-lock.json
index 1998122c78..af6f8c2ff1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "1.0.0",
       "license": "SEE LICENSE IN https://tc39.es/ecma262/#sec-copyright-and-software-license",
       "devDependencies": {
-        "ecmarkup": "^19.1.0",
+        "ecmarkup": "^20.0.0",
         "glob": "^7.1.6",
         "jsdom": "^15.0.0",
         "pagedjs": "^0.4.3",
@@ -1243,9 +1243,9 @@
       }
     },
     "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": {
@@ -1271,7 +1271,7 @@
         "emu-format": "bin/emu-format.js"
       },
       "engines": {
-        "node": ">= 12 || ^11.10.1 || ^10.13 || ^8.10"
+        "node": ">= 18"
       }
     },
     "node_modules/ecmarkup/node_modules/acorn-globals": {
diff --git a/package.json b/package.json
index e0695f3569..a2f5de6703 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "license": "SEE LICENSE IN https://tc39.es/ecma262/#sec-copyright-and-software-license",
   "homepage": "https://tc39.es/ecma262/",
   "devDependencies": {
-    "ecmarkup": "^19.1.0",
+    "ecmarkup": "^20.0.0",
     "glob": "^7.1.6",
     "jsdom": "^15.0.0",
     "pagedjs": "^0.4.3",
diff --git a/spec.html b/spec.html
index 42eb819fc7..4cab665734 100644
--- a/spec.html
+++ b/spec.html
@@ -934,6 +934,8 @@ <h1>
         <dl class="header">
           <dt>description</dt>
           <dd>It is used to emphasize that a Completion Record is being returned.</dd>
+          <dt>skip return checks</dt>
+          <dd>true</dd>
         </dl>
         <emu-alg>
           1. Assert: _completionRecord_ is a Completion Record.
@@ -4182,6 +4184,8 @@ <h1>
           ): a normal completion
         </h1>
         <dl class="header">
+          <dt>skip return checks</dt>
+          <dd>true</dd>
         </dl>
         <emu-alg>
           1. Return Completion Record { [[Type]]: ~normal~, [[Value]]: _value_, [[Target]]: ~empty~ }.
@@ -48850,6 +48854,8 @@ <h1>
           ): either a normal completion containing an ECMAScript language value or an abrupt completion
         </h1>
         <dl class="header">
+          <dt>skip return checks</dt>
+          <dd>true</dd>
         </dl>
         <emu-alg>
           1. Let _genContext_ be the running execution context.