diff --git a/app/build.gradle b/app/build.gradle
index 62fc7a3..3d24e42 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion '27.0.3'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.3'
     defaultConfig {
         applicationId "jp.shts.android.storyprogressbar"
         minSdkVersion 15
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
@@ -21,7 +21,7 @@ android {
 
 dependencies {
     implementation project(':library')
-    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
diff --git a/build.gradle b/build.gradle
index 767da9a..22b5263 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,12 +2,12 @@
 
 buildscript {
     repositories {
+        google()
         jcenter()
         mavenCentral()
-        google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.4'
+        classpath 'com.android.tools.build:gradle:3.2.1'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -16,8 +16,8 @@ buildscript {
 
 allprojects {
     repositories {
-        jcenter()
         google()
+        jcenter()
     }
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 74cc99b..096f39d 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-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
diff --git a/library/build.gradle b/library/build.gradle
index 79e87bc..b8fe8a4 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion '27.0.3'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         minSdkVersion 15
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
 
@@ -22,7 +22,7 @@ android {
 }
 
 dependencies {
-    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support:appcompat-v7:28.0.0'
     testImplementation 'junit:junit:4.12'
     androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
         exclude group: 'com.android.support', module: 'support-annotations'
diff --git a/library/src/main/java/jp/shts/android/storiesprogressview/StoriesProgressView.java b/library/src/main/java/jp/shts/android/storiesprogressview/StoriesProgressView.java
index 7c63d06..3ae0402 100644
--- a/library/src/main/java/jp/shts/android/storiesprogressview/StoriesProgressView.java
+++ b/library/src/main/java/jp/shts/android/storiesprogressview/StoriesProgressView.java
@@ -215,10 +215,21 @@ public void startStories(int from) {
         progressBars.get(from).startProgress();
     }
 
+    public void clear() {
+        progressBars.clear();
+        storiesCount = -1;
+        current = -1;
+        storiesListener = null;
+        isComplete = false;
+        isSkipStart = false;
+        isReverseStart = false;
+    }
+
     /**
      * Need to call when Activity or Fragment destroy
      */
     public void destroy() {
+        clear();
         for (PausableProgressBar p : progressBars) {
             p.clear();
         }