diff --git a/readme.md b/readme.md
index 52a2797bdc..c7e2a08eb8 100644
--- a/readme.md
+++ b/readme.md
@@ -74,7 +74,7 @@ Latest development builds (artifacts in Release configuration for each compiler
 	* [Groovy](tools/lang/Groovy.groovy), up to Groovy 5.0.
 	* [Haskell](tools/lang/Haskell.hs), up to GHC 9.6.
 	* [Haxe](tools/lang/Haxe.hx), up to Haxe 4.3.
-	* [HTML](tools/lang/html.html), up to [WHATWG](https://html.spec.whatwg.org/multipage/) December 2024. [Screenshots](https://github.com/zufuliu/notepad4/wiki/Screenshots#html)
+	* [HTML](tools/lang/html.html), up to [WHATWG](https://html.spec.whatwg.org/multipage/) January 2025. [Screenshots](https://github.com/zufuliu/notepad4/wiki/Screenshots#html)
 		* ASP
 		* ASP.NET
 		* JSP
diff --git a/src/EditLexers/stlHTML.cpp b/src/EditLexers/stlHTML.cpp
index c6b8c549a8..9600a5dd3e 100644
--- a/src/EditLexers/stlHTML.cpp
+++ b/src/EditLexers/stlHTML.cpp
@@ -40,7 +40,7 @@ static KEYWORDLIST Keywords_HTML = {{
 "abbr accept accept-charset accesskey action align alink allow allowfullscreen allowtransparency alpha alt archive "
 "as async autocapitalize autocomplete autocorrect autofocus autoplay axis "
 "background behavior bgcolor blocking border bordercolor bottommargin "
-"cellpadding cellspacing challenge char charoff charset checked cite class classid clear "
+"cellpadding cellspacing challenge char charoff charset checked cite class classid clear closedby "
 "code codebase codetype color colorspace cols colspan compact content contenteditable contextmenu controls coords "
 "crossorigin "
 "data datafld dataformatas datapagesize datasrc datatype datetime declare decoding default defer "
@@ -81,23 +81,25 @@ static KEYWORDLIST Keywords_HTML = {{
 "about allow-downloads allow-forms allow-modals allow-orientation-lock "
 "allow-pointer-lock allow-popups allow-popups-to-escape-sandbox allow-presentation allow-same-origin allow-scripts "
 "allow-top-navigation allow-top-navigation-by-user-activation allow-top-navigation-to-custom-protocols alternate always "
-"anonymous application-name application/octet-stream application/x-www-form-urlencoded application/xml author auto "
+"anonymous any application-name application/octet-stream application/x-www-form-urlencoded application/xml author auto "
 "blob bookmark "
-"canonical captions chapters characters checkbox circ circle closed "
+"canonical captions chapters characters checkbox circ circle closed closerequest "
 "color-scheme content-language content-security-policy content-type "
-"date datetime-local decimal default-style description descriptions display-p3 dns-prefetch done "
-"eager email en enter expect external false fetch file generator get go hard help hide http https icon image keywords "
-"lazy license limited-srgb lower-alpha lower-roman ltr "
-"mailto manual metadata module modulepreload month multipart/form-data "
-"never next no no-referrer no-referrer-when-downgrade nofollow none noopener noreferrer number numeric "
-"off on opener origin origin-when-cross-origin origin-when-crossorigin "
+"dark date datetime-local decimal default-style description descriptions device-height device-width display-p3 "
+"dns-prefetch done "
+"eager email en enter expect external false fetch file generator get go hard help hide hint http https "
+"icon image initial-scale interactive-widget keywords lazy license light limited-srgb lower-alpha lower-roman ltr "
+"mailto manual maximum-scale metadata minimum-scale module modulepreload month multipart/form-data "
+"never next no no-referrer no-referrer-when-downgrade nofollow none noopener noreferrer normal number numeric "
+"off on only opener origin origin-when-cross-origin origin-when-crossorigin overlays-content "
 "password pingback plaintext-only poly polygon post preconnect prefetch prerender prev previous privacy-policy "
-"radio range rect rectangle referrer refresh render reset row rowgroup rtl "
+"radio range rect rectangle referrer refresh render reset resizes-content resizes-visual row rowgroup rtl "
 "same-origin self send sentences set-cookie show sms soft strict-origin strict-origin-when-cross-origin stylesheet "
 "submit subtitles sync "
 "tag tel terms-of-service text/css text/ecmascript text/javascript text/jscript text/livescript text/plain text/xml "
 "theme-color toggle true "
-"unsafe-url until-found upper-alpha upper-roman url use-credentials utf-8 week words x-ua-compatible yes "
+"unsafe-url until-found upper-alpha upper-roman url use-credentials user-scalable utf-8 viewport week words "
+"x-ua-compatible yes "
 
 , nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr
 //--Autogenerated -- end of section automatically generated
diff --git a/tools/lang/html.html b/tools/lang/html.html
index aebb241684..5b92a9fd0e 100644
--- a/tools/lang/html.html
+++ b/tools/lang/html.html
@@ -1,5 +1,5 @@
 <!--
-https://whatwg.org/ 17 December 2024
+https://whatwg.org/ 17 January 2025
 HTML 4.01 https://www.w3.org/TR/html4/ 27 March 2018
 XHTML 2.0 https://www.w3.org/TR/xhtml2/ 16 December 2010
 XHTML 1.0 https://www.w3.org/TR/xhtml1/ 27 March 2018
@@ -31,7 +31,7 @@
 	lang="en" xml:lang xml:base
 	xmlns xmlns:xsi xsi:schemaLocation
 	nonce
-	popover="auto manual" popovertarget="toggle show hide" popovertargetaction
+	popover="auto manual hint" popovertarget="toggle show hide" popovertargetaction
 	spellcheck="true false"
 	style
 	tabindex
@@ -44,7 +44,7 @@
 		<!-- https://html.spec.whatwg.org/multipage/semantics.html -->
 		<base href target>
 		<!-- Link types https://html.spec.whatwg.org/multipage/links.html#linkTypes -->
-		<!-- Referrer Policy https://www.w3.org/TR/referrer-policy/ -->
+		<!-- Referrer Policy https://www.w3.org/TR/referrer-policy/ 26 January 2017 -->
 		<!-- https://fetch.spec.whatwg.org/#concept-request-destination -->
 		<link href
 			crossorigin="anonymous use-credentials"
@@ -58,7 +58,19 @@
 		<!-- Standard metadata names https://html.spec.whatwg.org/multipage/semantics.html#standard-metadata-names -->
 		<meta name="application-name author description generator keywords referrer theme-color color-scheme "
 			http-equiv="content-language content-type default-style refresh set-cookie x-ua-compatible content-security-policy"
-			content="never default always origin-when-crossorigin" charset="utf-8" media>
+			content charset="utf-8" media>
+		<meta name="referrer" content="never default always origin-when-crossorigin">
+		<!-- https://www.w3.org/TR/css-color-adjust-1/ 14 June 2022 -->
+		<meta name="color-scheme" content="normal dark light only" />
+		<!-- https://www.w3.org/TR/css-viewport-1/ 25 January 2024 -->
+		<!-- https://developer.mozilla.org/en-US/docs/Web/HTML/Viewport_meta_tag -->
+		<meta name="viewport" content="width=device-width, height=device-height, initial-scale=, minimum-scale=, maximum-scale=, user-scalable=yes, interactive-widget=resizes-visual resizes-content overlays-content">
+		<!-- https://developer.mozilla.org/en-US/docs/Web/HTML/Element/meta/name -->
+		<!-- The Open Graph protocol https://ogp.me/ -->
+		<!--
+		<meta name="creator publisher">
+		<meta property="og:title og:type og:image og:url">
+		-->
 		<style media blocking="render" type="text/css" title></style>
 	</head>
 	<!-- event handler content attributes https://html.spec.whatwg.org/multipage/dom.html#global-attributes -->
@@ -252,7 +264,7 @@ <h6></h6>
 		<img alt src srcset sizes crossorigin usemap ismap width height
 		decoding="sync async auto" loading="lazy eager" referrerpolicy fetchpriority>
 		<!-- https://html.spec.whatwg.org/multipage/iframe-embed-object.html -->
-		<!-- https://www.w3.org/TR/permissions-policy/ -->
+		<!-- https://www.w3.org/TR/permissions-policy/ 13 January 2025 -->
 		<!-- https://developer.mozilla.org/en-US/docs/Web/HTTP/Permissions_Policy -->
 		<iframe src srcdoc name
 		sandbox="allow-downloads allow-forms allow-modals allow-orientation-lock allow-pointer-lock allow-popups allow-popups-to-escape-sandbox allow-presentation allow-same-origin allow-scripts allow-top-navigation allow-top-navigation-by-user-activation allow-top-navigation-to-custom-protocols"
@@ -328,7 +340,7 @@ <h6></h6>
 		<!-- Interactive elements https://html.spec.whatwg.org/multipage/interactive-elements.html -->
 		<details name open></details>
 		<summary></summary>
-		<dialog open></dialog>
+		<dialog closedby="any closerequest none" open></dialog>
 		<!-- Scripting https://html.spec.whatwg.org/multipage/scripting.html -->
 		<script src type="text/javascript text/ecmascript text/jscript text/livescript module text/plain text/xml application/octet-stream application/xml"
 			charset nomodule async defer crossorigin integrity referrerpolicy blocking="render" fetchpriority></script>
@@ -462,7 +474,7 @@ <h1 align></h1>
 		<html virtualkeyboardpolicy>
 			<a attributionsrc target="_unfencedTop"></a>
 			<audio disableremoteplayback></audio>
-			<button command commandfor></button>
+			<button command="show-modal close show-popover hide-popover toggle-popover" commandfor></button>
 			<fencedframe allow height width></fencedframe>
 			<iframe allowpaymentrequest credentialless csp></iframe>
 			<img attributionsrc elementtiming>