diff --git a/package-lock.json b/package-lock.json
index b47fc0c6..25992679 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,10 +9,9 @@
       "version": "9.0.0",
       "license": "SEE LICENSE IN https://tc39.es/ecma402/#sec-copyright-and-software-license",
       "dependencies": {
-        "@tc39/ecma262-biblio": "2.1.2638",
-        "ecmarkup": "^18.0.0"
-      },
-      "devDependencies": {}
+        "@tc39/ecma262-biblio": "2.1.2678",
+        "ecmarkup": "^18.1.2"
+      }
     },
     "node_modules/@babel/code-frame": {
       "version": "7.12.11",
@@ -208,9 +207,9 @@
       }
     },
     "node_modules/@tc39/ecma262-biblio": {
-      "version": "2.1.2638",
-      "resolved": "https://registry.npmjs.org/@tc39/ecma262-biblio/-/ecma262-biblio-2.1.2638.tgz",
-      "integrity": "sha512-644cVhPBYBY5OGg5HTsEX9HqHMxkq0J+kf/BPdI715NAREi66RRpZzgNc4IdflKLfZou/U+vNtS7GYxfsHOu2g=="
+      "version": "2.1.2678",
+      "resolved": "https://registry.npmjs.org/@tc39/ecma262-biblio/-/ecma262-biblio-2.1.2678.tgz",
+      "integrity": "sha512-3I6m+wpNSHuQsJjeH3UgfqUaet1aM/9ReeWJH8H1H+DKLHfQafWK+OHQLgUbpd5ruJveC2AbyKuUVsXrtMV3Bw=="
     },
     "node_modules/@tootallnate/once": {
       "version": "2.0.0",
@@ -501,9 +500,9 @@
       }
     },
     "node_modules/ecmarkup": {
-      "version": "18.0.0",
-      "resolved": "https://registry.npmjs.org/ecmarkup/-/ecmarkup-18.0.0.tgz",
-      "integrity": "sha512-VSItKQ+39dv1FeR1YbGGlJ/rx17wsPSkS7morrOCwLGHh+7ehy89hao+rQ0/ptiBAN3nbytXzwUBUTC3XNmxaA==",
+      "version": "18.1.2",
+      "resolved": "https://registry.npmjs.org/ecmarkup/-/ecmarkup-18.1.2.tgz",
+      "integrity": "sha512-HqQXcUlmz66D2dGKEFcfApAftzTQfjjHrScccGmbFjuDjf82HQVBCX4vVwUnWpkVki2ioTDZUIvG8AVvRZg31g==",
       "dependencies": {
         "chalk": "^4.1.2",
         "command-line-args": "^5.2.0",
@@ -1556,9 +1555,9 @@
       }
     },
     "@tc39/ecma262-biblio": {
-      "version": "2.1.2638",
-      "resolved": "https://registry.npmjs.org/@tc39/ecma262-biblio/-/ecma262-biblio-2.1.2638.tgz",
-      "integrity": "sha512-644cVhPBYBY5OGg5HTsEX9HqHMxkq0J+kf/BPdI715NAREi66RRpZzgNc4IdflKLfZou/U+vNtS7GYxfsHOu2g=="
+      "version": "2.1.2678",
+      "resolved": "https://registry.npmjs.org/@tc39/ecma262-biblio/-/ecma262-biblio-2.1.2678.tgz",
+      "integrity": "sha512-3I6m+wpNSHuQsJjeH3UgfqUaet1aM/9ReeWJH8H1H+DKLHfQafWK+OHQLgUbpd5ruJveC2AbyKuUVsXrtMV3Bw=="
     },
     "@tootallnate/once": {
       "version": "2.0.0",
@@ -1782,9 +1781,9 @@
       }
     },
     "ecmarkup": {
-      "version": "18.0.0",
-      "resolved": "https://registry.npmjs.org/ecmarkup/-/ecmarkup-18.0.0.tgz",
-      "integrity": "sha512-VSItKQ+39dv1FeR1YbGGlJ/rx17wsPSkS7morrOCwLGHh+7ehy89hao+rQ0/ptiBAN3nbytXzwUBUTC3XNmxaA==",
+      "version": "18.1.2",
+      "resolved": "https://registry.npmjs.org/ecmarkup/-/ecmarkup-18.1.2.tgz",
+      "integrity": "sha512-HqQXcUlmz66D2dGKEFcfApAftzTQfjjHrScccGmbFjuDjf82HQVBCX4vVwUnWpkVki2ioTDZUIvG8AVvRZg31g==",
       "requires": {
         "chalk": "^4.1.2",
         "command-line-args": "^5.2.0",
diff --git a/package.json b/package.json
index ce3a9ca6..ba8c825b 100644
--- a/package.json
+++ b/package.json
@@ -18,9 +18,7 @@
   "license": "SEE LICENSE IN https://tc39.es/ecma402/#sec-copyright-and-software-license",
   "homepage": "https://tc39.es/ecma402/",
   "dependencies": {
-    "ecmarkup": "^18.0.0",
-    "@tc39/ecma262-biblio": "2.1.2638"
-  },
-  "devDependencies": {
+    "ecmarkup": "^18.1.2",
+    "@tc39/ecma262-biblio": "2.1.2678"
   }
 }
diff --git a/spec/listformat.html b/spec/listformat.html
index 23933cd5..93068d12 100644
--- a/spec/listformat.html
+++ b/spec/listformat.html
@@ -383,16 +383,14 @@ <h1>
           1. Return a new empty List.
         1. Let _iteratorRecord_ be ? GetIterator(_iterable_, ~sync~).
         1. Let _list_ be a new empty List.
-        1. Let _next_ be *true*.
-        1. Repeat, while _next_ is not *false*,
-          1. Set _next_ to ? IteratorStep(_iteratorRecord_).
-          1. If _next_ is not *false*, then
-            1. Let _nextValue_ be ? IteratorValue(_next_).
-            1. If Type(_nextValue_) is not String, then
-              1. Let _error_ be ThrowCompletion(a newly created *TypeError* object).
-              1. Return ? IteratorClose(_iteratorRecord_, _error_).
-            1. Append _nextValue_ to _list_.
-        1. Return _list_.
+        1. Repeat,
+          1. Let _next_ be ? IteratorStepValue(_iteratorRecord_).
+          1. If _next_ is ~done~, then
+            1. Return _list_.
+          1. If Type(_next_) is not String, then
+            1. Let _error_ be ThrowCompletion(a newly created *TypeError* object).
+            1. Return ? IteratorClose(_iteratorRecord_, _error_).
+          1. Append _next_ to _list_.
       </emu-alg>
       <emu-note>
         <p>This algorithm raises exceptions when it encounters values that are not Strings, because there is no obvious locale-aware coercion for arbitrary values.</p>