diff --git a/src/core/config/scripts/generateHTMLEntities.mjs b/src/core/config/scripts/generateHTMLEntities.mjs
index 12126a36..6ff2bdbb 100644
--- a/src/core/config/scripts/generateHTMLEntities.mjs
+++ b/src/core/config/scripts/generateHTMLEntities.mjs
@@ -4,7 +4,8 @@
  * operations.
  *
  * The data is derived from the vendored WHATWG named character reference set
- * (htmlEntities.json, from https://html.spec.whatwg.org/entities.json) so the
+ * (src/core/vendor/htmlEntities/entity.json, from
+ * https://html.spec.whatwg.org/entities.json) so the
  * two operations cannot drift apart and every entity is spec-conformant:
  *
  *   - HTML_ENTITY_REVERSE_LOOKUP (decode) is every single-code-point spec name.
@@ -34,7 +35,8 @@ if (!fs.existsSync(path.join(process.cwd(), "src/core/lib"))) {
     process.exit(1);
 }
 
-const SPEC = JSON.parse(fs.readFileSync(path.join(scriptDir, "htmlEntities.json"), "utf8"));
+const SPEC = JSON.parse(fs.readFileSync(
+    path.join(scriptDir, "..", "..", "vendor", "htmlEntities", "entity.json"), "utf8"));
 
 // Build code point -> [spec names] for single-code-point, semicolon-terminated
 // references (the representable subset; multi-code-point entities are skipped).
@@ -97,7 +99,8 @@ const code = `/**
  * HTML entity lookup tables shared by the "To HTML Entity" and "From HTML Entity"
  * operations, derived from the WHATWG named character reference set
  * (https://html.spec.whatwg.org/entities.json). Do not edit by hand — change the
- * vendored htmlEntities.json or htmlEntityOverrides.mjs and regenerate.
+ * vendored src/core/vendor/htmlEntities/entity.json or htmlEntityOverrides.mjs
+ * and regenerate.
  *
  * @author roberson-io [michaelroberson@gmail.com]
  * @copyright Crown Copyright ${new Date().getUTCFullYear()}
diff --git a/src/core/config/scripts/htmlEntities.json b/src/core/vendor/htmlEntities/entity.json
similarity index 100%
rename from src/core/config/scripts/htmlEntities.json
rename to src/core/vendor/htmlEntities/entity.json
diff --git a/src/core/vendor/htmlEntities/entity.txt b/src/core/vendor/htmlEntities/entity.txt
new file mode 100644
index 00000000..14696f83
--- /dev/null
+++ b/src/core/vendor/htmlEntities/entity.txt
@@ -0,0 +1,14 @@
+entity.json is the WHATWG named character reference set, retrieved verbatim from:
+
+    https://html.spec.whatwg.org/entities.json
+
+It is used by src/core/config/scripts/generateHTMLEntities.mjs to generate the
+shared HTML entity lookup tables (src/core/lib/HTMLEntities.mjs) consumed by the
+"To HTML Entity" and "From HTML Entity" operations.
+
+Source: HTML Standard — 13.5 Named character references
+    https://html.spec.whatwg.org/multipage/named-characters.html
+
+Copyright and licence
+---------------------
+Copyright © WHATWG (Apple, Google, Mozilla, Microsoft). This work is licensed under a Creative Commons Attribution 4.0 International License. To the extent portions of it are incorporated into source code, such portions in the source code are licensed under the BSD 3-Clause License instead.
diff --git a/tests/node/tests/ToHTMLEntity.mjs b/tests/node/tests/ToHTMLEntity.mjs
index e3bf683a..2ac47f3d 100644
--- a/tests/node/tests/ToHTMLEntity.mjs
+++ b/tests/node/tests/ToHTMLEntity.mjs
@@ -11,7 +11,7 @@ import path from "path";
 // Vendored WHATWG named character reference set (https://html.spec.whatwg.org/entities.json).
 const SPEC = JSON.parse(readFileSync(path.join(
     path.dirname(fileURLToPath(import.meta.url)),
-    "../../../src/core/config/scripts/htmlEntities.json"), "utf8"));
+    "../../../src/core/vendor/htmlEntities/entity.json"), "utf8"));
 const specByName = {};
 for (const [key, val] of Object.entries(SPEC))
     if (key.endsWith(";")) specByName[key.slice(1, -1)] = val.codepoints;