diff --git a/build.gradle.kts b/build.gradle.kts
index c1efeab..a33eb91 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -4,7 +4,7 @@ plugins {
 }
 
 group = "dev.dediamondpro"
-version = "1.0-SNAPSHOT61"
+version = "1.0-SNAPSHOT62"
 
 repositories {
     mavenCentral()
diff --git a/src/main/java/dev/dediamondpro/minemark/MineMarkCore.java b/src/main/java/dev/dediamondpro/minemark/MineMarkCore.java
index 67ce396..360f134 100644
--- a/src/main/java/dev/dediamondpro/minemark/MineMarkCore.java
+++ b/src/main/java/dev/dediamondpro/minemark/MineMarkCore.java
@@ -14,9 +14,10 @@
 
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
+import java.io.Reader;
 import java.util.List;
 import java.util.Map;
-import java.util.regex.Pattern;
+import java.util.concurrent.locks.ReentrantLock;
 
 /**
  * Class responsible for integrating parsing, layout and rendering
@@ -26,6 +27,7 @@ public class MineMarkCore<L extends LayoutConfig, R> {
     private final HtmlRenderer htmlRenderer;
     private final MineMarkHtmlParser<L, R> htmlParser;
     private final org.ccil.cowan.tagsoup.Parser xmlParser;
+    private final ReentrantLock parsingLock = new ReentrantLock();
 
     /**
      * @param elements     Elements supported to create a layout and render
@@ -50,24 +52,40 @@ protected MineMarkCore(Map<List<String>, ElementLoader<L, R>> elements, Iterable
      * @param markdown     The markdown text to parse
      * @param layoutConfig The config used at parsing time to create the layout
      * @return The parsed markdown element
-     * @throws RuntimeException When parsing fails or an error occurs
+     * @throws SAXException An exception during SAX parsing
+     * @throws IOException An IOException during parsing
      */
-    public MineMarkElement<L, R> parse(@NotNull L layoutConfig, @NotNull String markdown) {
-        long start1 = System.currentTimeMillis();
+    public MineMarkElement<L, R> parse(@NotNull L layoutConfig, @NotNull String markdown) throws SAXException, IOException {
         Node document = markdownParser.parse(markdown);
+        return parseDocument(layoutConfig, document);
+    }
+
+    /**
+     * Parse markdown to an element used to render it
+     *
+     * @param markdown     The markdown text to parse
+     * @param layoutConfig The config used at parsing time to create the layout
+     * @return The parsed markdown element
+     * @throws SAXException An exception during SAX parsing
+     * @throws IOException An IOException during parsing
+     */
+    public MineMarkElement<L, R> parse(@NotNull L layoutConfig, @NotNull Reader markdown) throws SAXException, IOException {
+        Node document = markdownParser.parseReader(markdown);
+        return parseDocument(layoutConfig, document);
+    }
+
+    private MineMarkElement<L, R> parseDocument(@NotNull L layoutConfig, Node document) throws SAXException, IOException {
         String html = "<minemark>\n" + htmlRenderer.render(document) + "</minemark>";
         System.out.println(html);
-        long start2 = System.currentTimeMillis();
-        System.out.println("Finished generating html, took " + (start2 - start1) + "ms");
         try {
+            // Acquire the lock to make sure this thread is the only one using the parser
+            parsingLock.lock();
             htmlParser.setLayoutConfig(layoutConfig);
             xmlParser.parse(new InputSource(new ByteArrayInputStream(html.getBytes())));
             return htmlParser.getParsedResult();
-        } catch (SAXException | IOException e) {
-            throw new RuntimeException(e);
         } finally {
             htmlParser.cleanUp();
-            System.out.println("Finished parsing html, took " + (System.currentTimeMillis() - start2) + "ms");
+            parsingLock.unlock();
         }
     }
 
diff --git a/src/main/java/dev/dediamondpro/minemark/elements/Elements.java b/src/main/java/dev/dediamondpro/minemark/elements/Elements.java
index 8597ea3..e4276af 100644
--- a/src/main/java/dev/dediamondpro/minemark/elements/Elements.java
+++ b/src/main/java/dev/dediamondpro/minemark/elements/Elements.java
@@ -6,7 +6,7 @@
 public enum Elements {
     PARAGRAPH(listOf("p")),
     TEXT(listOf("text")),
-    FORMATTING(listOf("strong", "em", "del", "pre")),
+    FORMATTING(listOf("strong", "b", "em", "i", "ins", "u", "del", "s", "pre")),
     HEADING(listOf("h1", "h2", "h3", "h4", "h5", "h6")),
     ALIGNMENT(listOf("div", "center")),
     LINK(listOf("a")),
diff --git a/src/main/java/dev/dediamondpro/minemark/elements/MineMarkElement.java b/src/main/java/dev/dediamondpro/minemark/elements/MineMarkElement.java
index 2e7c1f5..06f1c13 100644
--- a/src/main/java/dev/dediamondpro/minemark/elements/MineMarkElement.java
+++ b/src/main/java/dev/dediamondpro/minemark/elements/MineMarkElement.java
@@ -19,13 +19,11 @@ public MineMarkElement(L layoutConfig, Attributes attributes) {
 
     @Override
     public void generateLayout(LayoutData layoutData) {
-        long start = System.currentTimeMillis();
         super.generateLayout(layoutData);
         height = layoutData.getY() + layoutData.getLineHeight();
         for (Consumer<Float> callback : layoutCallbacks) {
             callback.accept(height);
         }
-        System.out.println("Finished generating layout, took " + (System.currentTimeMillis() - start) + "ms");
     }
 
     @Override
diff --git a/src/main/java/dev/dediamondpro/minemark/elements/impl/formatting/FormattingElement.java b/src/main/java/dev/dediamondpro/minemark/elements/impl/formatting/FormattingElement.java
index 6a5eeb6..2e32990 100644
--- a/src/main/java/dev/dediamondpro/minemark/elements/impl/formatting/FormattingElement.java
+++ b/src/main/java/dev/dediamondpro/minemark/elements/impl/formatting/FormattingElement.java
@@ -14,15 +14,19 @@ public FormattingElement(@NotNull L layoutConfig, @Nullable Element<L, R> parent
         this.layoutConfig = cloneLayoutConfig(layoutConfig);
         switch (qName) {
             case "strong":
+            case "b":
                 this.layoutConfig.setBold(true);
                 break;
             case "em":
+            case "i":
                 this.layoutConfig.setItalic(true);
                 break;
             case "ins":
+            case "u":
                 this.layoutConfig.setUnderlined(true);
                 break;
             case "del":
+            case "s":
                 this.layoutConfig.setStrikethrough(true);
                 break;
             case "pre":
diff --git a/src/test/java/BasicTest.java b/src/test/java/BasicTest.java
index f03068a..e829c2d 100644
--- a/src/test/java/BasicTest.java
+++ b/src/test/java/BasicTest.java
@@ -4,6 +4,7 @@
 import dev.dediamondpro.minemark.elements.MineMarkElement;
 import org.commonmark.ext.gfm.strikethrough.StrikethroughExtension;
 import org.junit.jupiter.api.Test;
+import org.xml.sax.SAXException;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ -20,14 +21,14 @@ public class BasicTest {
     private final LayoutConfig config = new LayoutConfig(5, new LayoutConfig.SpacingConfig(1f, 2f, 2f, 5f), new LayoutConfig.HeadingConfig(6, 5, 4, 3, 2, 1));
 
     @Test
-    public void test() {
+    public void test() throws IOException, SAXException {
         MineMarkElement<LayoutConfig, Object> element = core.parse(config, "```\ntest\n```\nHello<br>World");
         //element.beforeDraw(0f, 0f, 25f, 0f, 0f, new Object());
         System.out.println(element.getTree());
     }
 
     @Test
-    public void testFile() throws IOException {
+    public void testFile() throws IOException, SAXException {
         MineMarkElement<LayoutConfig, Object> element = core.parse(config, readFromInputStream(getClass().getResourceAsStream("test.md")));
         System.out.println(element.getTree());
     }
diff --git a/src/test/resources/test.md b/src/test/resources/test.md
index f08e706..85e38f0 100644
--- a/src/test/resources/test.md
+++ b/src/test/resources/test.md
@@ -13,4 +13,6 @@ that's an issue?
 
 - Hi
 
-</div>
\ No newline at end of file
+</div>
+
+<s>taco</s>
\ No newline at end of file