diff --git a/README.md b/README.md
index 2c50abe..518ad2d 100644
--- a/README.md
+++ b/README.md
@@ -284,6 +284,11 @@ li {
         <td>cubic bezier easing functions: http://easings.net/de</td>
         <td>default: 'ease'</td>
     </tr>
+    <tr>
+        <td>initialIndex</td>
+        <td>the slide index to show when the slider is initialized</td>
+        <td>default: 0</td>
+    </tr>
     <tr>
         <td>classNameFrame</td>
         <td>class name for slider frame</td>
diff --git a/index.html b/index.html
index c4f1f0b..e81795c 100644
--- a/index.html
+++ b/index.html
@@ -698,6 +698,11 @@ <h2>Options</h2>
                     <td>time for the snapBack of the slider if the slide attempt was not valid</td>
                     <td>default: 200</td>
                 </tr>
+                <tr>
+                    <td>initialIndex</td>
+                    <td>the slide index to show when the slider is initialized</td>
+                    <td>default: 0</td>
+                </tr>
                 <tr>
                     <th>ease</th>
                     <td>cubic bezier easing functions: http://easings.net/de</td>