diff --git a/README.md b/README.md
index 5732648..c6b7f47 100644
--- a/README.md
+++ b/README.md
@@ -22,11 +22,27 @@ There are some gifs from Demo:
 - selectAll/deselectAll
 - getAllSelectedNodes
 
+Now supports [sevar83's IndeterminateCheckBox](https://github.com/sevar83/indeterminate-checkbox) as well as Android's android.widget.CheckBox
+
 ### Usage
 **1.Reference the library from your module's build.gradle:**
-```groovy
-compile 'me.texy.treeview:treeview_lib:1.0.3'
-```
+1. You need to have this in your project's `build.gradle` file:
+
+    ```Gradle
+    allprojects {
+        repositories {
+            jcenter()
+            maven { url "https://jitpack.io" }
+        }
+    }
+    ```
+2. You need this in your app's module `build.gradle` file:
+    ```Gradle
+    dependencies {
+        compile 'com.github.penguin86:TreeView:1.0.5@aar'
+    }
+    ```
+
 **2.Implement your all level's BaseNodeViewBinder**
 
 Sample：
diff --git a/app/build.gradle b/app/build.gradle
index f90b194..0f1e216 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 25
+    compileSdkVersion 27
     buildToolsVersion "25.0.2"
     defaultConfig {
         applicationId "me.texy.treeviewdemo"
@@ -24,10 +24,11 @@ dependencies {
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:appcompat-v7:25.0.0'
-    compile 'com.android.support:recyclerview-v7:25.0.0'
+    compile 'com.android.support:appcompat-v7:27.0.2'
+    compile 'com.android.support:recyclerview-v7:27.0.2'
     testCompile 'junit:junit:4.12'
     compile project(':treeview_lib')
 //    compile 'me.texy.treeview:treeview_lib:1.0.1'
+    compile 'com.github.sevar83:indeterminate-checkbox:1.0.5@aar'
 
 }
diff --git a/app/src/main/res/layout/item_first_level.xml b/app/src/main/res/layout/item_first_level.xml
index 2df1cbb..b06cb8f 100644
--- a/app/src/main/res/layout/item_first_level.xml
+++ b/app/src/main/res/layout/item_first_level.xml
@@ -30,7 +30,7 @@
     </LinearLayout>
 
 
-    <android.support.v7.widget.AppCompatCheckBox
+    <com.buildware.widget.indeterm.IndeterminateCheckBox
         android:id="@+id/checkBox"
         android:layout_width="30dp"
         android:layout_height="30dp"
diff --git a/app/src/main/res/layout/item_second_level.xml b/app/src/main/res/layout/item_second_level.xml
index 69dcd77..3d1634b 100644
--- a/app/src/main/res/layout/item_second_level.xml
+++ b/app/src/main/res/layout/item_second_level.xml
@@ -29,7 +29,7 @@
             android:textSize="15dp" />
     </LinearLayout>
 
-    <android.support.v7.widget.AppCompatCheckBox
+    <com.buildware.widget.indeterm.IndeterminateCheckBox
         android:id="@+id/checkBox"
         android:layout_width="30dp"
         android:layout_height="30dp"
diff --git a/app/src/main/res/layout/item_third_level.xml b/app/src/main/res/layout/item_third_level.xml
index b9d4150..23ed888 100644
--- a/app/src/main/res/layout/item_third_level.xml
+++ b/app/src/main/res/layout/item_third_level.xml
@@ -24,7 +24,7 @@
             android:textSize="15dp" />
     </LinearLayout>
 
-    <android.support.v7.widget.AppCompatCheckBox
+    <com.buildware.widget.indeterm.IndeterminateCheckBox
         android:id="@+id/checkBox"
         android:layout_width="30dp"
         android:layout_height="30dp"
diff --git a/build.gradle b/build.gradle
index 7492639..c8fa56d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,9 +3,10 @@
 buildscript {
     repositories {
         jcenter()
+        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.3.0'
+        classpath 'com.android.tools.build:gradle:2.3.3'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
         classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.6'
         // NOTE: Do not place your application dependencies here; they belong
@@ -16,6 +17,8 @@ buildscript {
 allprojects {
     repositories {
         jcenter()
+        maven { url "https://jitpack.io" }
+        google()
     }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index d0a9b3c..b347011 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
diff --git a/treeview_lib/build.gradle b/treeview_lib/build.gradle
index 8aa2562..4d3d7a3 100644
--- a/treeview_lib/build.gradle
+++ b/treeview_lib/build.gradle
@@ -1,7 +1,7 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 25
+    compileSdkVersion 27
     buildToolsVersion "25.0.2"
 
     defaultConfig {
@@ -26,8 +26,10 @@ dependencies {
     androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    compile 'com.android.support:recyclerview-v7:25.0.0'
-    compile 'com.android.support:appcompat-v7:25.0.0'
+    compile 'com.android.support:recyclerview-v7:27.0.2'
+    compile 'com.android.support:appcompat-v7:27.0.2'
     testCompile 'junit:junit:4.12'
+    compile 'org.jetbrains:annotations-java5:15.0'
+    compile 'com.github.sevar83:indeterminate-checkbox:1.0.5@aar'
 }
 apply from: "bintray.gradle"
diff --git a/treeview_lib/src/main/java/me/texy/treeview/TreeViewAdapter.java b/treeview_lib/src/main/java/me/texy/treeview/TreeViewAdapter.java
index 301505e..b15be12 100644
--- a/treeview_lib/src/main/java/me/texy/treeview/TreeViewAdapter.java
+++ b/treeview_lib/src/main/java/me/texy/treeview/TreeViewAdapter.java
@@ -15,6 +15,7 @@
 package me.texy.treeview;
 
 import android.content.Context;
+import android.graphics.Color;
 import android.support.annotation.NonNull;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
@@ -22,6 +23,8 @@
 import android.view.ViewGroup;
 import android.widget.CheckBox;
 
+import com.buildware.widget.indeterm.IndeterminateCheckBox;
+
 import java.util.ArrayList;
 import java.util.List;
 
@@ -140,7 +143,14 @@ public void onClick(View v) {
 
             if (view != null && view instanceof CheckBox) {
                 final CheckBox checkableView = (CheckBox) view;
-                checkableView.setChecked(treeNode.isSelected());
+
+                if(treeNode.isSelected()){
+                    checkableView.setChecked(true);
+                } else if(view instanceof IndeterminateCheckBox && TreeHelper.hasOneSelectedNodeAtLeast(treeNode)) {
+                        ((IndeterminateCheckBox) view).setIndeterminate(true);
+                } else {
+                    checkableView.setChecked(false);
+                }
 
                 checkableView.setOnClickListener(new View.OnClickListener() {
                     @Override
diff --git a/treeview_lib/src/main/java/me/texy/treeview/animator/DefaultItemAnimator.java b/treeview_lib/src/main/java/me/texy/treeview/animator/DefaultItemAnimator.java
index 76267bd..0c3cc76 100644
--- a/treeview_lib/src/main/java/me/texy/treeview/animator/DefaultItemAnimator.java
+++ b/treeview_lib/src/main/java/me/texy/treeview/animator/DefaultItemAnimator.java
@@ -16,7 +16,6 @@
 package me.texy.treeview.animator;
 
 import android.support.annotation.NonNull;
-import android.support.v4.animation.AnimatorCompatHelper;
 import android.support.v4.view.ViewCompat;
 import android.support.v4.view.ViewPropertyAnimatorCompat;
 import android.support.v4.view.ViewPropertyAnimatorListener;
@@ -517,7 +516,7 @@ public void endAnimation(ViewHolder item) {
     }
 
     private void resetAnimation(ViewHolder holder) {
-        AnimatorCompatHelper.clearInterpolator(holder.itemView);
+        //AnimatorCompatHelper.clearInterpolator(holder.itemView);
         endAnimation(holder);
     }
 
diff --git a/treeview_lib/src/main/java/me/texy/treeview/helper/TreeHelper.java b/treeview_lib/src/main/java/me/texy/treeview/helper/TreeHelper.java
index f876111..cd0fb77 100644
--- a/treeview_lib/src/main/java/me/texy/treeview/helper/TreeHelper.java
+++ b/treeview_lib/src/main/java/me/texy/treeview/helper/TreeHelper.java
@@ -254,12 +254,19 @@ public static List<TreeNode> selectParentIfNeedWhenNodeSelected(TreeNode treeNod
             parent.setSelected(true);
             impactedParents.add(parent);
             impactedParents.addAll(selectParentIfNeedWhenNodeSelected(parent, true));
+        } else if(select){
+            impactedParents.add(parent);
+            impactedParents.addAll(selectParentIfNeedWhenNodeSelected(parent, true));
         } else if (!select && selectedBrotherCount == brothers.size() - 1) {
             // only the condition that the size of selected's brothers
             // is one less than total count can trigger the deselect
             parent.setSelected(false);
             impactedParents.add(parent);
             impactedParents.addAll(selectParentIfNeedWhenNodeSelected(parent, false));
+        } else {
+            // only some selected/deselected: refresh parent view
+            impactedParents.add(parent);
+            impactedParents.addAll(selectParentIfNeedWhenNodeSelected(parent, false));
         }
         return impactedParents;
     }