diff --git a/Telegram/SourceFiles/data/data_document.cpp b/Telegram/SourceFiles/data/data_document.cpp
index c3ab565296..e8fd3cfa0f 100644
--- a/Telegram/SourceFiles/data/data_document.cpp
+++ b/Telegram/SourceFiles/data/data_document.cpp
@@ -411,7 +411,7 @@ void DocumentData::setattributes(
 
 void DocumentData::validateLottieSticker() {
 	if (type == FileDocument
-		&& _mimeString == qstr("application/x-tgsticker")) {
+		&& hasMimeType(qstr("application/x-tgsticker"))) {
 		type = StickerDocument;
 		_additional = std::make_unique<StickerData>();
 		sticker()->animated = true;
@@ -442,9 +442,8 @@ bool DocumentData::checkWallPaperProperties() {
 		|| !dimensions.height()
 		|| dimensions.width() > Storage::kMaxWallPaperDimension
 		|| dimensions.height() > Storage::kMaxWallPaperDimension
-		|| size > Storage::kMaxWallPaperInMemory
-		|| mimeString() == qstr("application/x-tgwallpattern")) {
-		return false; // #TODO themes support svg patterns
+		|| size > Storage::kMaxWallPaperInMemory) {
+		return false;
 	}
 	type = WallPaperDocument;
 	return true;
@@ -487,9 +486,18 @@ bool DocumentData::isWallPaper() const {
 }
 
 bool DocumentData::isPatternWallPaper() const {
+	return isWallPaper()
+		&& (isPatternWallPaperPNG() || isPatternWallPaperSVG());
+}
+
+bool DocumentData::isPatternWallPaperPNG() const {
 	return isWallPaper() && hasMimeType(qstr("image/png"));
 }
 
+bool DocumentData::isPatternWallPaperSVG() const {
+	return isWallPaper() && hasMimeType(qstr("application/x-tgwallpattern"));
+}
+
 bool DocumentData::hasThumbnail() const {
 	return _thumbnail.location.valid();
 }
@@ -661,9 +669,9 @@ bool DocumentData::saveToCache() const {
 		&& ((type == StickerDocument)
 			|| isAnimation()
 			|| isVoiceMessage()
-			|| (type == WallPaperDocument)
+			|| isWallPaper()
 			|| isTheme()
-			|| (mimeString() == qstr("image/png")
+			|| (hasMimeType(qstr("image/png"))
 				&& _filename.startsWith("image_")));
 }
 
@@ -1233,11 +1241,12 @@ QString DocumentData::mimeString() const {
 }
 
 bool DocumentData::hasMimeType(QLatin1String mime) const {
-	return !_mimeString.compare(mime, Qt::CaseInsensitive);
+	return (_mimeString == mime);
 }
 
 void DocumentData::setMimeString(const QString &mime) {
 	_mimeString = mime;
+	_mimeString = std::move(_mimeString).toLower();
 }
 
 MediaKey DocumentData::mediaKey() const {
@@ -1263,7 +1272,7 @@ uint8 DocumentData::cacheTag() const {
 		return Data::kVideoMessageCacheTag;
 	} else if (isAnimation()) {
 		return Data::kAnimationCacheTag;
-	} else if (type == WallPaperDocument) {
+	} else if (isWallPaper()) {
 		return Data::kImageCacheTag;
 	}
 	return 0;
@@ -1298,14 +1307,9 @@ bool DocumentData::isGifv() const {
 }
 
 bool DocumentData::isTheme() const {
-	return
-		_mimeString == qstr("application/x-tgtheme-tdesktop")
-		|| _filename.endsWith(
-			qstr(".tdesktop-theme"),
-			Qt::CaseInsensitive)
-		|| _filename.endsWith(
-			qstr(".tdesktop-palette"),
-			Qt::CaseInsensitive);
+	return hasMimeType(qstr("application/x-tgtheme-tdesktop"))
+		|| _filename.endsWith(qstr(".tdesktop-theme"), Qt::CaseInsensitive)
+		|| _filename.endsWith(qstr(".tdesktop-palette"), Qt::CaseInsensitive);
 }
 
 bool DocumentData::isSong() const {
diff --git a/Telegram/SourceFiles/data/data_document.h b/Telegram/SourceFiles/data/data_document.h
index 09d7ec1211..09d1f5b3c9 100644
--- a/Telegram/SourceFiles/data/data_document.h
+++ b/Telegram/SourceFiles/data/data_document.h
@@ -155,6 +155,8 @@ public:
 	bool checkWallPaperProperties();
 	[[nodiscard]] bool isWallPaper() const;
 	[[nodiscard]] bool isPatternWallPaper() const;
+	[[nodiscard]] bool isPatternWallPaperPNG() const;
+	[[nodiscard]] bool isPatternWallPaperSVG() const;
 
 	[[nodiscard]] bool hasThumbnail() const;
 	[[nodiscard]] bool thumbnailLoading() const;
diff --git a/Telegram/SourceFiles/data/data_document_media.cpp b/Telegram/SourceFiles/data/data_document_media.cpp
index 736fdb2c10..8e5c63fec2 100644
--- a/Telegram/SourceFiles/data/data_document_media.cpp
+++ b/Telegram/SourceFiles/data/data_document_media.cpp
@@ -39,6 +39,8 @@ enum class FileType {
 	Video,
 	AnimatedSticker,
 	WallPaper,
+	WallPatternPNG,
+	WallPatternSVG,
 	Theme,
 };
 
@@ -60,6 +62,15 @@ enum class FileType {
 		return Lottie::ReadThumbnail(Lottie::ReadContent(data, path));
 	} else if (type == FileType::Theme) {
 		return Window::Theme::GeneratePreview(data, path);
+	} else if (type == FileType::WallPatternSVG) {
+		return Images::Read({
+			.path = path,
+			.content = std::move(data),
+			.maxSize = QSize(
+				kWallPaperThumbnailLimit,
+				kWallPaperThumbnailLimit),
+			.gzipSvg = true,
+		}).image;
 	}
 	auto buffer = QBuffer(&data);
 	auto file = QFile(path);
@@ -390,7 +401,11 @@ void DocumentMedia::checkStickerLarge(not_null<FileLoader*> loader) {
 void DocumentMedia::GenerateGoodThumbnail(
 		not_null<DocumentData*> document,
 		QByteArray data) {
-	const auto type = document->isWallPaper()
+	const auto type = document->isPatternWallPaperSVG()
+		? FileType::WallPatternSVG
+		: document->isPatternWallPaperPNG()
+		? FileType::WallPatternPNG
+		: document->isWallPaper()
 		? FileType::WallPaper
 		: document->isTheme()
 		? FileType::Theme
@@ -415,7 +430,8 @@ void DocumentMedia::GenerateGoodThumbnail(
 			auto buffer = QBuffer(&bytes);
 			const auto format = (type == FileType::AnimatedSticker)
 				? "WEBP"
-				: (type == FileType::WallPaper && result.hasAlphaChannel())
+				: (type == FileType::WallPatternPNG
+					|| type == FileType::WallPatternSVG)
 				? "PNG"
 				: "JPG";
 			result.save(&buffer, format, kGoodThumbQuality);
diff --git a/Telegram/SourceFiles/data/data_document_resolver.cpp b/Telegram/SourceFiles/data/data_document_resolver.cpp
index 12aae4be3e..53049a70af 100644
--- a/Telegram/SourceFiles/data/data_document_resolver.cpp
+++ b/Telegram/SourceFiles/data/data_document_resolver.cpp
@@ -33,6 +33,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 namespace Data {
 namespace {
 
+constexpr auto kMaxWallpaperSize = 3072;
+
 void LaunchWithWarning(
 		// not_null<Window::Controller*> controller,
 		const QString &name,
@@ -173,27 +175,38 @@ bool IsIpRevealingName(const QString &filepath) {
 	);
 }
 
+[[nodiscard]] QImage ReadImage(
+		const QString &path,
+		const QByteArray &content,
+		bool gzipSvg) {
+	return Images::Read({
+		.path = path,
+		.content = content,
+		.maxSize = QSize(kMaxWallpaperSize, kMaxWallpaperSize),
+		.gzipSvg = gzipSvg,
+	}).image;
+}
+
 base::binary_guard ReadImageAsync(
 		not_null<Data::DocumentMedia*> media,
 		FnMut<QImage(QImage)> postprocess,
 		FnMut<void(QImage&&)> done) {
 	auto result = base::binary_guard();
+	const auto gzipSvg = media->owner()->isPatternWallPaperSVG();
 	crl::async([
+		gzipSvg,
 		bytes = media->bytes(),
 		path = media->owner()->filepath(),
 		postprocess = std::move(postprocess),
 		guard = result.make_guard(),
 		callback = std::move(done)
 	]() mutable {
-		auto read = Images::Read({
-			.path = path,
-			.content = bytes,
-		});
+		auto image = ReadImage(path, bytes, gzipSvg);
 		if (postprocess) {
-			read.image = postprocess(std::move(read.image));
+			image = postprocess(std::move(image));
 		}
 		crl::on_main(std::move(guard), [
-			image = std::move(read.image),
+			image = std::move(image),
 			callback = std::move(callback)
 		]() mutable {
 			callback(std::move(image));
diff --git a/Telegram/SourceFiles/layout/layout_document_generic_preview.cpp b/Telegram/SourceFiles/layout/layout_document_generic_preview.cpp
index 2206f10205..11c9615189 100644
--- a/Telegram/SourceFiles/layout/layout_document_generic_preview.cpp
+++ b/Telegram/SourceFiles/layout/layout_document_generic_preview.cpp
@@ -35,9 +35,7 @@ DocumentGenericPreview DocumentGenericPreview::Create(
 			: document->filename())
 		: tr::lng_message_empty(tr::now)).toLower();
 	auto lastDot = name.lastIndexOf('.');
-	const auto mime = document
-		? document->mimeString().toLower()
-		: QString();
+	const auto mime = document ? document->mimeString() : QString();
 	if (name.endsWith(qstr(".doc")) ||
 		name.endsWith(qstr(".docx")) ||
 		name.endsWith(qstr(".txt")) ||
diff --git a/Telegram/lib_lottie b/Telegram/lib_lottie
index 2f9bda2cc7..06960b493d 160000
--- a/Telegram/lib_lottie
+++ b/Telegram/lib_lottie
@@ -1 +1 @@
-Subproject commit 2f9bda2cc7b8c94abe34f501b270df8533a7b141
+Subproject commit 06960b493d58d7c4e642dc38384d5f0db5340f1c
diff --git a/Telegram/lib_ui b/Telegram/lib_ui
index 2bd63281b5..dd88f8fa41 160000
--- a/Telegram/lib_ui
+++ b/Telegram/lib_ui
@@ -1 +1 @@
-Subproject commit 2bd63281b58d54aa129da78f05f0e6e73e5d63c9
+Subproject commit dd88f8fa41a06bdf3128276d8084cfa4f087dee7