diff --git a/.idea/.idea.Html2Markdown/.idea/sonarlint.xml b/.idea/.idea.Html2Markdown/.idea/sonarlint.xml
new file mode 100644
index 00000000..f0b33da7
--- /dev/null
+++ b/.idea/.idea.Html2Markdown/.idea/sonarlint.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="SonarLintProjectSettings">
+    <option name="bindingEnabled" value="true" />
+    <option name="projectKey" value="baynezy_Html2Markdown" />
+    <option name="serverId" value="open source" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/.idea.Html2Markdown/.idea/sonarlint/issuestore/6/7/67b930d18dec91a33af163b768de668916419abe b/.idea/.idea.Html2Markdown/.idea/sonarlint/issuestore/6/7/67b930d18dec91a33af163b768de668916419abe
new file mode 100644
index 00000000..e69de29b
diff --git a/.idea/.idea.Html2Markdown/.idea/sonarlint/issuestore/7/4/74fc7b790e5b95a61f3f2942ea2a8eec781a2be0 b/.idea/.idea.Html2Markdown/.idea/sonarlint/issuestore/7/4/74fc7b790e5b95a61f3f2942ea2a8eec781a2be0
new file mode 100644
index 00000000..e69de29b
diff --git a/.idea/.idea.Html2Markdown/.idea/sonarlint/issuestore/index.pb b/.idea/.idea.Html2Markdown/.idea/sonarlint/issuestore/index.pb
new file mode 100644
index 00000000..2bef50e4
--- /dev/null
+++ b/.idea/.idea.Html2Markdown/.idea/sonarlint/issuestore/index.pb
@@ -0,0 +1,5 @@
+
+[
++src/Html2Markdown/Replacement/HtmlParser.cs,6\7\67b930d18dec91a33af163b768de668916419abe
+`
+0src/Html2Markdown/Replacement/PatternReplacer.cs,7\4\74fc7b790e5b95a61f3f2942ea2a8eec781a2be0
\ No newline at end of file
diff --git a/.idea/.idea.Html2Markdown/.idea/sonarlint/securityhotspotstore/6/7/67b930d18dec91a33af163b768de668916419abe b/.idea/.idea.Html2Markdown/.idea/sonarlint/securityhotspotstore/6/7/67b930d18dec91a33af163b768de668916419abe
new file mode 100644
index 00000000..e69de29b
diff --git a/.idea/.idea.Html2Markdown/.idea/sonarlint/securityhotspotstore/7/4/74fc7b790e5b95a61f3f2942ea2a8eec781a2be0 b/.idea/.idea.Html2Markdown/.idea/sonarlint/securityhotspotstore/7/4/74fc7b790e5b95a61f3f2942ea2a8eec781a2be0
new file mode 100644
index 00000000..e69de29b
diff --git a/.idea/.idea.Html2Markdown/.idea/sonarlint/securityhotspotstore/index.pb b/.idea/.idea.Html2Markdown/.idea/sonarlint/securityhotspotstore/index.pb
new file mode 100644
index 00000000..2bef50e4
--- /dev/null
+++ b/.idea/.idea.Html2Markdown/.idea/sonarlint/securityhotspotstore/index.pb
@@ -0,0 +1,5 @@
+
+[
++src/Html2Markdown/Replacement/HtmlParser.cs,6\7\67b930d18dec91a33af163b768de668916419abe
+`
+0src/Html2Markdown/Replacement/PatternReplacer.cs,7\4\74fc7b790e5b95a61f3f2942ea2a8eec781a2be0
\ No newline at end of file
diff --git a/src/Html2Markdown/Replacement/HtmlParser.cs b/src/Html2Markdown/Replacement/HtmlParser.cs
index 93b1f45a..0406335a 100644
--- a/src/Html2Markdown/Replacement/HtmlParser.cs
+++ b/src/Html2Markdown/Replacement/HtmlParser.cs
@@ -221,9 +221,11 @@ private static string GetSyntaxHighlightLanguage(HtmlNode node)
 			return string.Empty;
 		}
 
-		return classAttributeValue.StartsWith("lang") 
-			? classAttributeValue.Split('-').Last() 
-			: classAttributeValue;
+		if (!classAttributeValue.StartsWith("lang")) return classAttributeValue;
+		var split =  classAttributeValue.Split('-');
+				
+		return split[^1]; // PERFORMANCE: https://sonarcloud.io/organizations/baynezy/rules?open=csharpsquid%3AS6608&rule_key=csharpsquid%3AS6608
+
 	}
 
 	internal static string ReplaceBlockquote(string html)
diff --git a/src/Html2Markdown/Replacement/PatternReplacer.cs b/src/Html2Markdown/Replacement/PatternReplacer.cs
index 0c6e7052..e414b3c5 100644
--- a/src/Html2Markdown/Replacement/PatternReplacer.cs
+++ b/src/Html2Markdown/Replacement/PatternReplacer.cs
@@ -11,7 +11,8 @@ public class PatternReplacer : IReplacer
 	public string Replacement { get; init; }
 	public string Replace(string html)
 	{
-		var regex = new Regex(Pattern);
+		// SECURITY: https://sonarcloud.io/organizations/baynezy/rules?open=csharpsquid%3AS6444&rule_key=csharpsquid%3AS6444
+		var regex = new Regex(Pattern, RegexOptions.None, TimeSpan.FromSeconds(1));
 
 		return regex.Replace(html, Replacement);
 	}