diff --git a/build.gradle b/build.gradle
index 8d7d90b..1868f5a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,9 +5,9 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
-        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.0'
+        classpath 'com.android.tools.build:gradle:3.2.0'
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
+        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
     }
 }
 
@@ -40,11 +40,11 @@ ext {
 }
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 28
 
     defaultConfig {
         minSdkVersion 14
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 21
         versionName libraryVersion
     }
@@ -63,7 +63,7 @@ android {
 }
 
 dependencies {
-    api 'com.android.support:support-annotations:27.1.1'
+    api 'androidx.annotation:annotation:1.0.0'
 }
 
 group = publishedGroupId
diff --git a/gradle.properties b/gradle.properties
index aac7c9b..156ecca 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,17 +1,3 @@
-# Project-wide Gradle settings.
-
-# IDE (e.g. Android Studio) users:
-# Gradle settings configured through the IDE *will override*
-# any settings specified in this file.
-
-# For more details on how to configure your build environment visit
-# http://www.gradle.org/docs/current/userguide/build_environment.html
-
-# Specifies the JVM arguments used for the daemon process.
-# The setting is particularly useful for tweaking memory settings.
+# org.gradle.java.home=
 org.gradle.jvmargs=-Xmx1536m
-
-# When configured, Gradle will run in incubating parallel mode.
-# This option should only be used with decoupled projects. More details, visit
-# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
-# org.gradle.parallel=true
+android.useAndroidX=true
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 7a3265e..f6b961f 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index a435a93..f38c257 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Jul 03 12:25:58 MSK 2017
+#Thu Sep 13 13:30:38 MSK 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip
diff --git a/src/main/java/com/budiyev/android/circularprogressbar/CircularProgressBar.java b/src/main/java/com/budiyev/android/circularprogressbar/CircularProgressBar.java
index ef0d570..c09a85b 100644
--- a/src/main/java/com/budiyev/android/circularprogressbar/CircularProgressBar.java
+++ b/src/main/java/com/budiyev/android/circularprogressbar/CircularProgressBar.java
@@ -32,14 +32,14 @@
 import android.graphics.Paint;
 import android.graphics.RectF;
 import android.os.Build;
-import android.support.annotation.AttrRes;
-import android.support.annotation.ColorInt;
-import android.support.annotation.FloatRange;
-import android.support.annotation.IntRange;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
-import android.support.annotation.RequiresApi;
-import android.support.annotation.StyleRes;
+import androidx.annotation.AttrRes;
+import androidx.annotation.ColorInt;
+import androidx.annotation.FloatRange;
+import androidx.annotation.IntRange;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
+import androidx.annotation.StyleRes;
 import android.util.AttributeSet;
 import android.util.DisplayMetrics;
 import android.view.View;