diff --git a/build.gradle b/build.gradle
index 93b210e..e3f67ba 100755
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.0.0'
+        classpath 'com.android.tools.build:gradle:2.2.2'
     }
 }
 
diff --git a/gradle.properties b/gradle.properties
index eea214d..9ea8730 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,4 +1,4 @@
 ANDROID_BUILD_MIN_SDK_VERSION=8
 ANDROID_BUILD_TARGET_SDK_VERSION=22
-ANDROID_BUILD_SDK_VERSION=22
-ANDROID_BUILD_TOOLS_VERSION=22.0.1
+ANDROID_BUILD_SDK_VERSION=25
+ANDROID_BUILD_TOOLS_VERSION=25
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 76dedcb..16b42c5 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-2.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
diff --git a/ptr-demo/src/in/srain/cube/views/ptr/demo/app/PtrDemoApplication.java b/ptr-demo/src/in/srain/cube/views/ptr/demo/app/PtrDemoApplication.java
index ca13220..3334664 100644
--- a/ptr-demo/src/in/srain/cube/views/ptr/demo/app/PtrDemoApplication.java
+++ b/ptr-demo/src/in/srain/cube/views/ptr/demo/app/PtrDemoApplication.java
@@ -32,7 +32,6 @@ public void onCreate() {
 
         CubeDebug.DEBUG_IMAGE = true;
         PtrFrameLayout.DEBUG = true;
-        PtrFrameLayout.DEBUG = false;
 
         ImageLoaderFactory.setDefaultImageReSizer(DemoDuiTangImageReSizer.getInstance());
         ImageLoaderFactory.setDefaultImageLoadHandler(new PtrImageLoadHandler());
diff --git a/ptr-lib/src/in/srain/cube/views/ptr/PtrFrameLayout.java b/ptr-lib/src/in/srain/cube/views/ptr/PtrFrameLayout.java
index dc1ea65..031b60a 100755
--- a/ptr-lib/src/in/srain/cube/views/ptr/PtrFrameLayout.java
+++ b/ptr-lib/src/in/srain/cube/views/ptr/PtrFrameLayout.java
@@ -370,7 +370,9 @@ private void movePos(float deltaY) {
         }
 
         mPtrIndicator.setCurrentPos(to);
+
         int change = to - mPtrIndicator.getLastPosY();
+
         updatePos(change);
     }