diff --git a/build.gradle b/build.gradle
index 26d6af8..aa98b04 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.5.0'
+        classpath 'com.android.tools.build:gradle:2.2.3'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 0c71e76..a5d6b25 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Wed Apr 10 15:27:10 PDT 2013
+#Fri Aug 18 14:52:46 KRAT 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
diff --git a/library/build.gradle b/library/build.gradle
index 2e8a66c..19de02f 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.3"
 
     defaultConfig {
         minSdkVersion 15
-        targetSdkVersion 23
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }
@@ -21,8 +21,4 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile 'com.google.code.gson:gson:2.6.2'
-}
-
-
-
-apply from: 'https://raw.github.com/chrisbanes/gradle-mvn-push/master/gradle-mvn-push.gradle'
+}
\ No newline at end of file
diff --git a/library/src/main/assets/icarus-editor/editor.html b/library/src/main/assets/icarus-editor/editor.html
index 1499c88..51c5af6 100644
--- a/library/src/main/assets/icarus-editor/editor.html
+++ b/library/src/main/assets/icarus-editor/editor.html
@@ -20,7 +20,7 @@
 
 <script>
     var editor;
-    var toolbar = ['title', 'bold', 'italic', 'underline', 'strikethrough', 'fontScale', 'color', '|', 'ol', 'ul', 'blockquote', 'code', 'table', '|', 'link', 'image', 'hr', '|', 'indent', 'outdent', 'alignment', 'alignLeft', 'alignCenter', 'alignRight', 'html'];
+    var toolbar = ['h1_button', 'h2_button', 'h3_button', 'title', 'bold', 'italic', 'underline', 'strikethrough', 'fontScale', 'color', '|', 'ol', 'ul', 'blockquote', 'code', 'table', '|', 'link', 'image', 'hr', '|', 'indent', 'outdent', 'alignment', 'alignLeft', 'alignCenter', 'alignRight', 'html'];
     var defaultOptions = {
         textarea: $('#txt-content'),
         placeholder: '',
diff --git a/library/src/main/assets/icarus-editor/scripts/simditor.js b/library/src/main/assets/icarus-editor/scripts/simditor.js
index 9ed981c..97708bc 100644
--- a/library/src/main/assets/icarus-editor/scripts/simditor.js
+++ b/library/src/main/assets/icarus-editor/scripts/simditor.js
@@ -14,7 +14,7 @@
   }
 }(this, function ($, SimpleModule, simpleHotkeys, simpleUploader) {
 
-var AlignCenterButton, AlignLeftButton, AlignRightButton, AlignmentButton, BlockquoteButton, BoldButton, Button, Clipboard, CodeButton, CodePopover, ColorButton, FontScaleButton, Formatter, HrButton, HtmlButton, ImageButton, ImagePopover, IndentButton, Indentation, InputManager, ItalicButton, Keystroke, LinkButton, ListButton, OrderListButton, OutdentButton, Popover, Selection, Simditor, SimditorMention, StrikethroughButton, TableButton, TitleButton, Toolbar, UnderlineButton, UndoManager, UnorderListButton, Util,
+var H1Button, H2Button, H3Button, AlignCenterButton, AlignLeftButton, AlignRightButton, AlignmentButton, BlockquoteButton, BoldButton, Button, Clipboard, CodeButton, CodePopover, ColorButton, FontScaleButton, Formatter, HrButton, HtmlButton, ImageButton, ImagePopover, IndentButton, Indentation, InputManager, ItalicButton, Keystroke, LinkButton, ListButton, OrderListButton, OutdentButton, Popover, Selection, Simditor, SimditorMention, StrikethroughButton, TableButton, TitleButton, Toolbar, UnderlineButton, UndoManager, UnorderListButton, Util,
   extend = function(child, parent) { for (var key in parent) { if (hasProp.call(parent, key)) child[key] = parent[key]; } function ctor() { this.constructor = child; } ctor.prototype = parent.prototype; child.prototype = new ctor(); child.__super__ = parent.prototype; return child; },
   hasProp = {}.hasOwnProperty,
   indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; },
@@ -2999,6 +2999,7 @@ Button = (function(superClass) {
     }
     console.log("active", active);
     console.log(this);
+    console.log(new Error('1'));
     IcarusBridge.setButtonActivated(this.name, active);
     this.active = active;
     return this.el.toggleClass('active', this.active);
@@ -3511,6 +3512,7 @@ TitleButton = (function(superClass) {
   };
 
   TitleButton.prototype.command = function(param) {
+  document.execCommand('bold');
     var $rootNodes;
     $rootNodes = this.editor.selection.rootNodes();
     this.editor.selection.save();
@@ -3534,6 +3536,209 @@ TitleButton = (function(superClass) {
 
 Simditor.Toolbar.addButton(TitleButton);
 
+//added new type button H1Button, H2Button, H3Button
+H1Button = (function(superClass) {
+  extend(H1Button, superClass);
+
+  function H1Button() {
+    return H1Button.__super__.constructor.apply(this, arguments);
+  }
+
+  H1Button.prototype.name = 'h1_button';
+
+  H1Button.prototype.htmlTag = 'h1';
+
+  H1Button.prototype.disableTag = 'pre, table';
+
+  H1Button.prototype._init = function() {
+    this.menu = [
+     {
+        name: 'h1',
+        text: this._t('h1_button') + ' 1',
+        param: 'h1'
+      }
+    ];
+    return H1Button.__super__._init.call(this);
+  };
+
+  H1Button.prototype.setActive = function(active, param) {
+    H1Button.__super__.setActive.call(this, active);
+    if (active) {
+      param || (param = this.node[0].tagName.toLowerCase());
+    }
+    this.el.removeClass('active-p active-h1 active-h2 active-h3 active-h4 active-h5');
+    if (active) {
+      return this.el.addClass('active active-' + param);
+    }
+  };
+
+  H1Button.prototype.command = function(param) {
+    var $rootNodes;
+    $rootNodes = this.editor.selection.rootNodes();
+    var selectedNode = editor.selection.nodes()[0];
+    this.editor.selection.save();
+
+        console.log(selectedNode);
+        console.log($rootNodes);
+
+    $rootNodes.each((function(_this) {
+      return function(i, node) {
+        var $node;
+        $node = $(node);
+        if ($node.is('blockquote') || $node.is(_this.disableTag) || _this.editor.util.isDecoratedNode($node)) {
+                  return;
+                }
+                  if (node === selectedNode && $node.is(param)) {
+                    $('<p/>').append($node.contents()).replaceAll($node);
+                    return;
+                  }
+                return $('<' + param + '/>').append($node.contents()).replaceAll($node);
+      };
+    })(this));
+    this.editor.selection.restore();
+    return this.editor.trigger('valuechanged');
+  };
+
+  return H1Button;
+
+})(Button);
+Simditor.Toolbar.addButton(H1Button);
+
+H2Button = (function(superClass) {
+  extend(H2Button, superClass);
+
+  function H2Button() {
+    return H2Button.__super__.constructor.apply(this, arguments);
+  }
+
+  H2Button.prototype.name = 'h2_button';
+
+  H2Button.prototype.htmlTag = 'h2';
+
+  H2Button.prototype.disableTag = 'pre, table';
+
+  H2Button.prototype._init = function() {
+    this.menu = [
+     {
+        name: 'h2',
+        text: this._t('h2_button') + ' 1',
+        param: 'h2'
+      }
+    ];
+    return H2Button.__super__._init.call(this);
+  };
+
+  H2Button.prototype.setActive = function(active, param) {
+    H2Button.__super__.setActive.call(this, active);
+    if (active) {
+      param || (param = this.node[0].tagName.toLowerCase());
+    }
+    this.el.removeClass('active-p active-h1 active-h2 active-h3 active-h4 active-h5');
+    if (active) {
+      return this.el.addClass('active active-' + param);
+    }
+  };
+
+  H2Button.prototype.command = function(param) {
+    var $rootNodes;
+    $rootNodes = this.editor.selection.rootNodes();
+    var selectedNode = editor.selection.nodes()[0];
+    this.editor.selection.save();
+
+        console.log(selectedNode);
+        console.log($rootNodes);
+
+    $rootNodes.each((function(_this) {
+      return function(i, node) {
+        var $node;
+        $node = $(node);
+        if ($node.is('blockquote') || $node.is(_this.disableTag) || _this.editor.util.isDecoratedNode($node)) {
+                  return;
+                }
+                  if (node === selectedNode && $node.is(param)) {
+                    $('<p/>').append($node.contents()).replaceAll($node);
+                    return;
+                  }
+                return $('<' + param + '/>').append($node.contents()).replaceAll($node);
+      };
+    })(this));
+    this.editor.selection.restore();
+    return this.editor.trigger('valuechanged');
+  };
+
+  return H2Button;
+
+})(Button);
+Simditor.Toolbar.addButton(H2Button);
+
+
+H3Button = (function(superClass) {
+  extend(H3Button, superClass);
+
+  function H3Button() {
+    return H3Button.__super__.constructor.apply(this, arguments);
+  }
+
+  H3Button.prototype.name = 'h3_button';
+
+  H3Button.prototype.htmlTag = 'h3';
+
+  H3Button.prototype.disableTag = 'pre, table';
+
+  H3Button.prototype._init = function() {
+    this.menu = [
+     {
+        name: 'h3',
+        text: this._t('h3_button') + ' 1',
+        param: 'h3'
+      }
+    ];
+    return H3Button.__super__._init.call(this);
+  };
+
+  H3Button.prototype.setActive = function(active, param) {
+    H3Button.__super__.setActive.call(this, active);
+    if (active) {
+      param || (param = this.node[0].tagName.toLowerCase());
+    }
+    this.el.removeClass('active-p active-h1 active-h2 active-h3 active-h4 active-h5');
+    if (active) {
+      return this.el.addClass('active active-' + param);
+    }
+  };
+
+  H3Button.prototype.command = function(param) {
+    var $rootNodes;
+    $rootNodes = this.editor.selection.rootNodes();
+    var selectedNode = editor.selection.nodes()[0];
+    this.editor.selection.save();
+
+        console.log(selectedNode);
+        console.log($rootNodes);
+
+    $rootNodes.each((function(_this) {
+      return function(i, node) {
+        var $node;
+        $node = $(node);
+        if ($node.is('blockquote') || $node.is(_this.disableTag) || _this.editor.util.isDecoratedNode($node)) {
+                  return;
+                }
+                  if (node === selectedNode && $node.is(param)) {
+                    $('<p/>').append($node.contents()).replaceAll($node);
+                    return;
+                  }
+                return $('<' + param + '/>').append($node.contents()).replaceAll($node);
+      };
+    })(this));
+    this.editor.selection.restore();
+    return this.editor.trigger('valuechanged');
+  };
+
+  return H3Button;
+
+})(Button);
+Simditor.Toolbar.addButton(H3Button);
+
 HtmlButton = (function(superClass) {
   extend(HtmlButton, superClass);
 
diff --git a/library/src/main/java/com/github/mr5/icarus/button/HeadingButton.java b/library/src/main/java/com/github/mr5/icarus/button/HeadingButton.java
new file mode 100644
index 0000000..8c030d8
--- /dev/null
+++ b/library/src/main/java/com/github/mr5/icarus/button/HeadingButton.java
@@ -0,0 +1,108 @@
+package com.github.mr5.icarus.button;
+
+import android.os.Build;
+import android.text.Html;
+import android.text.Spanned;
+import android.widget.TextView;
+
+import com.github.mr5.icarus.Icarus;
+
+/**
+ * Button use in RichEditor for tags H1, H2, H3
+ */
+
+public class HeadingButton extends TextViewButton{
+
+    public static final String NAME_HEADER_H1 = "h1_button";
+    public static final String NAME_HEADER_H2 = "h2_button";
+    public static final String NAME_HEADER_H3 = "h3_button";
+    public static final String NAME_HEADER_H4 = "h4_button";
+    public static final String NAME_HEADER_H5 = "h5_button";
+    public static final String NAME_HEADER_H6 = "h6_button";
+
+    /**
+     * Constructor for initialization basic constructor
+     *
+     * @param aTextView view that was clicked
+     * @param aIcarus   object, which manages content in webview
+     */
+    public HeadingButton(TextView aTextView, Icarus aIcarus){
+        super(aTextView, aIcarus);
+    }
+
+    /**
+     * set label for a button
+     *
+     * @param aName name button
+     */
+    public void setName(String aName) {
+        this.name = aName; //for internal use of the base class
+        setLabel(aName);
+    }
+
+    /**
+     * sending a command to js to process the selected tag
+     */
+    public void command() {
+        icarus.jsExec("editor.toolbar.buttons['" + name + "'].command('" + getTag(name) + "')");
+    }
+
+    /**
+     * setting a label for a button
+     *
+     * @param aName name button
+     */
+    private void setLabel(String aName) {
+        String htmlName = null;
+        switch (aName) {
+            case NAME_HEADER_H1:
+                htmlName = "<b>H1</b>";
+                break;
+            case NAME_HEADER_H2:
+                htmlName = "<b>H2</b>";
+                break;
+            case NAME_HEADER_H3:
+                htmlName = "<b>H3</b>";
+                break;
+            case NAME_HEADER_H4:
+                htmlName = "<b>H4</b>";
+                break;
+            case NAME_HEADER_H5:
+                htmlName = "<b>H5</b>";
+                break;
+            case NAME_HEADER_H6:
+                htmlName = "<b>H6</b>";
+                break;
+            default:
+                htmlName = "<b>H</b>";
+                break;
+        }
+        this.textView.setText(getStringFromHtml(htmlName));
+    }
+
+    /**
+     * convert html to spanned
+     *
+     * @param aHtml html code to display a button label
+     * @return spanned object
+     */
+    private Spanned getStringFromHtml(String aHtml) {
+        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.N){
+            return Html.fromHtml(aHtml, 0);
+        } else {
+            return Html.fromHtml(aHtml);
+        }
+    }
+
+    /**
+     * get tag from name button
+     *
+     * @param aName name button
+     * @return name tag (example: h1)
+     */
+    private String getTag(String aName) {
+        return aName.split("_button")[0];
+    }
+
+
+}
diff --git a/library/src/main/res/values/strings.xml b/library/src/main/res/values/strings.xml
index bd2a599..dad30fe 100644
--- a/library/src/main/res/values/strings.xml
+++ b/library/src/main/res/values/strings.xml
@@ -39,4 +39,10 @@
     <string name="icon_font_minus">&#xf01c;</string>
     <string name="icon_font_markdown">&#xf01d;</string>
     <string name="icon_checklist">&#xf01e;</string>
+    <string name="icon_h1" translatable="false">H1</string>
+    <string name="icon_h2" translatable="false">H2</string>
+    <string name="icon_h3" translatable="false">H3</string>
+    <string name="icon_h4" translatable="false">H4</string>
+    <string name="icon_h5" translatable="false">H5</string>
+    <string name="icon_h6" translatable="false">H6</string>
 </resources>
diff --git a/samples/src/main/java/com/github/mr5/samples/icarus/MainActivity.java b/samples/src/main/java/com/github/mr5/samples/icarus/MainActivity.java
index 6a13ed0..1c9f591 100644
--- a/samples/src/main/java/com/github/mr5/samples/icarus/MainActivity.java
+++ b/samples/src/main/java/com/github/mr5/samples/icarus/MainActivity.java
@@ -15,6 +15,7 @@
 import com.github.mr5.icarus.Toolbar;
 import com.github.mr5.icarus.button.Button;
 import com.github.mr5.icarus.button.FontScaleButton;
+import com.github.mr5.icarus.button.HeadingButton;
 import com.github.mr5.icarus.button.TextViewButton;
 import com.github.mr5.icarus.entity.Options;
 import com.github.mr5.icarus.popover.FontScalePopoverImpl;
@@ -107,6 +108,24 @@ private Toolbar prepareToolbar(TextViewToolbar toolbar, Icarus icarus) {
         TextViewButton fontScaleButton = new FontScaleButton(fontScaleTextView, icarus);
         fontScaleButton.setPopover(new FontScalePopoverImpl(fontScaleTextView, icarus));
         toolbar.addButton(fontScaleButton);
+
+        TextView headingTextViewH1 = (TextView) findViewById(R.id.button_h1);
+        headingTextViewH1.setTypeface(iconfont);
+        TextViewButton headingH1Button = new HeadingButton(headingTextViewH1, icarus);
+        headingH1Button.setName(HeadingButton.NAME_HEADER_H1);
+        toolbar.addButton(headingH1Button);
+
+        TextView headingTextViewH2 = (TextView) findViewById(R.id.button_h2);
+        headingTextViewH1.setTypeface(iconfont);
+        TextViewButton headingH2Button = new HeadingButton(headingTextViewH2, icarus);
+        headingH2Button.setName(HeadingButton.NAME_HEADER_H2);
+        toolbar.addButton(headingH2Button);
+
+        TextView headingTextViewH3 = (TextView) findViewById(R.id.button_h3);
+        headingTextViewH1.setTypeface(iconfont);
+        TextViewButton headingH3Button = new HeadingButton(headingTextViewH3, icarus);
+        headingH3Button.setName(HeadingButton.NAME_HEADER_H3);
+        toolbar.addButton(headingH3Button);
         return toolbar;
     }
 
diff --git a/samples/src/main/res/layout/activity_main.xml b/samples/src/main/res/layout/activity_main.xml
index 49895e8..140ff71 100644
--- a/samples/src/main/res/layout/activity_main.xml
+++ b/samples/src/main/res/layout/activity_main.xml
@@ -114,6 +114,21 @@
                 android:id="@+id/button_html5"
                 style="@style/EditorIcon"
                 android:text="@string/icon_html5" />
+
+            <TextView
+                android:id="@+id/button_h1"
+                style="@style/EditorIcon"
+                android:text="@string/icon_h1" />
+
+            <TextView
+                android:id="@+id/button_h2"
+                style="@style/EditorIcon"
+                android:text="@string/icon_h2" />
+
+            <TextView
+                android:id="@+id/button_h3"
+                style="@style/EditorIcon"
+                android:text="@string/icon_h2" />
         </LinearLayout>
     </HorizontalScrollView>
 </LinearLayout>
\ No newline at end of file