diff --git a/GUI/host/host.h b/GUI/host/host.h
index 43994e8..f817b3e 100644
--- a/GUI/host/host.h
+++ b/GUI/host/host.h
@@ -34,7 +34,7 @@ namespace Host
 inline std::wstring StringToWideString(const std::string& text, UINT encoding = CP_UTF8)
 {
 	std::wstring ret(text.size() + 1, 0);
-	if (int len = MultiByteToWideChar(encoding, 0, text.c_str(), -1, ret.data(), ret.capacity()))
+	if (int len = MultiByteToWideChar(encoding, 0, text.c_str(), -1, ret.data(), ret.size()))
 	{
 		ret.resize(len - 1);
 		return ret;
diff --git a/GUI/host/textthread.cc b/GUI/host/textthread.cc
index 86c0465..36b9670 100644
--- a/GUI/host/textthread.cc
+++ b/GUI/host/textthread.cc
@@ -42,6 +42,15 @@ void TextThread::Push(const BYTE* data, int len)
 	lastPushTime = GetTickCount();
 }
 
+bool TextThread::FilterRepetition(std::wstring& sentence)
+{
+	wchar_t* end = sentence.data() + sentence.size();
+	for (int len = sentence.size() / 3; len > 6; --len)
+		if (wcsncmp(end - len * 3, end - len * 2, len) == 0 && wcsncmp(end - len * 3, end - len * 1, len) == 0)
+			return true | FilterRepetition(sentence = end - len);
+	return false;
+}
+
 void TextThread::Flush()
 {
 	std::unique_lock locker(threadMutex);
@@ -50,10 +59,9 @@ void TextThread::Flush()
 	{
 		std::wstring sentence = buffer;
 		buffer.clear();
-		repeatingChars.clear();
 
-		for (std::wsmatch results; std::regex_search(sentence, results, std::wregex(L"^([^]{6,})\\1\\1")); sentence = results[1])
-			repeatingChars = std::unordered_set(sentence.begin(), sentence.end());
+		if (FilterRepetition(sentence)) repeatingChars = std::unordered_set(sentence.begin(), sentence.end());
+		else repeatingChars.clear();
 
 		locker.unlock();
 		AddSentence(sentence);
diff --git a/GUI/host/textthread.h b/GUI/host/textthread.h
index dcfb86d..1d3ea1f 100644
--- a/GUI/host/textthread.h
+++ b/GUI/host/textthread.h
@@ -32,6 +32,8 @@ public:
 	const HookParam hp;
 
 private:
+	// see https://github.com/Artikash/Textractor/issues/40
+	static bool FilterRepetition(std::wstring& sentence);
 	void Flush();
 
 	std::wstring buffer;