diff --git a/README.md b/README.md
index 3021743..c8d451f 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ repositories {
 }
 
 dependencies {
-    compile 'com.github.erz05:JoyStick:1.0.2@aar'
+    compile 'com.github.erz05:JoyStick:1.0.3@aar'
 }
 ```
 
diff --git a/app/build.gradle b/app/build.gradle
index d0bfffa..9a05971 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,13 +1,13 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    compileSdkVersion 25
+    buildToolsVersion "25"
 
     defaultConfig {
         applicationId "com.erz.joystick"
         minSdkVersion 11
-        targetSdkVersion 23
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }
@@ -22,7 +22,7 @@ android {
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:appcompat-v7:23.1.0'
-    compile 'com.android.support:design:23.1.0'
+    compile 'com.android.support:appcompat-v7:25.0.0'
+    compile 'com.android.support:design:25.0.0'
     compile project(':joysticklibrary')
-}
+}
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ad5a924..7266936 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -21,4 +21,4 @@
         </activity>
     </application>
 
-</manifest>
+</manifest>
\ No newline at end of file
diff --git a/app/src/main/java/com/erz/joystick/GameLoop.java b/app/src/main/java/com/erz/joystick/GameLoop.java
index 00396ec..71e2b5f 100644
--- a/app/src/main/java/com/erz/joystick/GameLoop.java
+++ b/app/src/main/java/com/erz/joystick/GameLoop.java
@@ -46,4 +46,4 @@ public class GameLoop extends Thread {
             } catch (Exception ignore) {}
         }
     }
-}
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/erz/joystick/GameView.java b/app/src/main/java/com/erz/joystick/GameView.java
index 13a6d9f..4ff2ce7 100644
--- a/app/src/main/java/com/erz/joystick/GameView.java
+++ b/app/src/main/java/com/erz/joystick/GameView.java
@@ -78,13 +78,13 @@ public class GameView extends SurfaceView implements SurfaceHolder.Callback {
         canvas.drawColor(Color.BLACK);
 
         if (stars != null && stars.size() > 0) {
-            for (i=0; i<size; i++) {
+            for (i = 0; i < size; i++) {
                 stars.get(i).draw(canvas, paint, width, height, maxRadius);
             }
         }
 
-        posX -= Math.cos(angle) * (power/2);
-        posY += Math.sin(-angle) * (power/2);
+        posX -= Math.cos(angle) * (power / 2);
+        posY += Math.sin(-angle) * (power / 2);
         if (posX > width - radius) posX = width - radius;
         if (posX < radius) posX = radius;
         if (posY > height - radius) posY = height - radius;
@@ -110,23 +110,23 @@ public class GameView extends SurfaceView implements SurfaceHolder.Callback {
         this.height = height;
         min = Math.min(width, height);
 
-        centerX = width/2;
-        centerY = height/2;
+        centerX = width / 2;
+        centerY = height / 2;
         posX = centerX;
         posY = centerY;
-        radius = min/12;
+        radius = min / 12;
         rectF = new RectF(posX - radius, posY - radius, posX + radius, posY + radius);
 
-        minSpeed = (int) (min/75);
-        maxSpeed = (int) (min/25);
+        minSpeed = (int) (min / 75);
+        maxSpeed = (int) (min / 25);
 
-        minRadius = (int) (min/250);
-        maxRadius = (int) (min/220);
+        minRadius = (int) (min / 250);
+        maxRadius = (int) (min / 220);
 
         if (maxRadius == minRadius) maxRadius += minRadius;
 
         stars = new Vector<>();
-        for (i=0; i<size; i++) {
+        for (i = 0; i < size; i++) {
             tmpRadius = random.nextInt(maxRadius - minRadius) + minRadius;
             maxX = width - tmpRadius;
             maxY = height - tmpRadius;
diff --git a/app/src/main/java/com/erz/joystick/Star.java b/app/src/main/java/com/erz/joystick/Star.java
index e8ea978..d72a494 100644
--- a/app/src/main/java/com/erz/joystick/Star.java
+++ b/app/src/main/java/com/erz/joystick/Star.java
@@ -42,4 +42,4 @@ public class Star {
             y = - (max * 4) - radius;
         }
     }
-}
+}
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index be515a8..900de7b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.3.0'
+        classpath 'com.android.tools.build:gradle:2.2.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -20,4 +20,4 @@ allprojects {
 
 task clean(type: Delete) {
     delete rootProject.buildDir
-}
+}
\ No newline at end of file
diff --git a/joysticklibrary/build.gradle b/joysticklibrary/build.gradle
index 4a1fd38..e6df239 100644
--- a/joysticklibrary/build.gradle
+++ b/joysticklibrary/build.gradle
@@ -2,12 +2,12 @@ apply plugin: 'com.android.library'
 apply plugin: 'com.novoda.bintray-release'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    compileSdkVersion 25
+    buildToolsVersion "25"
 
     defaultConfig {
         minSdkVersion 11
-        targetSdkVersion 23
+        targetSdkVersion 25
         versionCode 1
         versionName "1.0"
     }
@@ -32,7 +32,7 @@ publish {
     userOrg = 'erz05'
     groupId = 'com.github.erz05'
     artifactId = 'JoyStick'
-    version = '1.0.2'
+    version = '1.0.3'
     description = 'Android Library for JoyStick View'
     website = 'https://github.com/erz05/JoyStick'
-}
+}
\ No newline at end of file
diff --git a/joysticklibrary/src/main/java/com/erz/joysticklibrary/JoyStick.java b/joysticklibrary/src/main/java/com/erz/joysticklibrary/JoyStick.java
index e451625..5b900f1 100644
--- a/joysticklibrary/src/main/java/com/erz/joysticklibrary/JoyStick.java
+++ b/joysticklibrary/src/main/java/com/erz/joysticklibrary/JoyStick.java
@@ -120,13 +120,13 @@ public class JoyStick extends View {
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);
         width = MeasureSpec.getSize(widthMeasureSpec);
         height = MeasureSpec.getSize(heightMeasureSpec);
-        centerX = width/2;
-        centerY = height/2;
+        centerX = width / 2;
+        centerY = height / 2;
         min = Math.min(width, height);
         posX = centerX;
         posY = centerY;
-        buttonRadius = (min / 2f * (percentage/100f));
-        radius = (min / 2f * ((100f-percentage)/100f));
+        buttonRadius = (min / 2f * (percentage / 100f));
+        radius = (min / 2f * ((100f - percentage) / 100f));
     }
 
     @Override