diff --git a/.idea/copyright/profiles_settings.xml b/.idea/copyright/profiles_settings.xml
deleted file mode 100644
index e7bedf3..0000000
--- a/.idea/copyright/profiles_settings.xml
+++ /dev/null
@@ -1,3 +0,0 @@
-<component name="CopyrightManager">
-  <settings default="" />
-</component>
\ No newline at end of file
diff --git a/README.md b/README.md
index d5d5135..b706450 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ public class SampleApp extends Application {
 You can call `RxActivityResult.on(this).startIntent(intent)` supplying both, an `Activity` instance or a `Fragment` instance.
 Observe the emitted [Result](https://github.com/VictorAlbertos/RxActivityResult/blob/master/rx_activity_result/src/main/java/rx_activity_result/Result.java) item to know the resultCode and retrieve the associated data if appropriate.  
 
-**Limitation:**: Your fragments need to extend from `android.support.v4.app.Fragment` instead of `android.app.Fragment`, otherwise they won't be notified. 
+**Limitation:** Your fragments need to extend from `androidx.fragment.app.Fragment` instead of `android.app.Fragment`, otherwise they won't be notified.
 
 
 ```java
diff --git a/app/build.gradle b/app/build.gradle
index 677b9d4..1ff8af7 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -1,20 +1,14 @@
 apply plugin: 'com.android.application'
-apply plugin: 'me.tatarka.retrolambda'
 
 buildscript {
     repositories {
         mavenCentral()
         jcenter()
     }
-
-    dependencies {
-        classpath 'me.tatarka:gradle-retrolambda:3.2.4'
-    }
 }
 
 android {
-    compileSdkVersion 24
-    buildToolsVersion "24.0.1"
+    compileSdkVersion 28
 
     defaultConfig {
         applicationId "io.victoralbertos.app"
@@ -22,7 +16,7 @@ android {
         targetSdkVersion 24
         versionCode 1
         versionName "1.0"
-        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
     buildTypes {
         release {
@@ -40,33 +34,41 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile project(":rx_activity_result")
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation project(":rx_activity_result")
 
-    compile 'com.android.support:appcompat-v7:24.2.1'
-    compile 'com.android.support:design:24.2.1'
+    implementation('androidx.appcompat:appcompat:1.0.2') {
+        exclude group: "androidx.legacy", module: "legacy-support-core-utils"
+    }
+    implementation('com.google.android.material:material:1.0.0'){
+        exclude group: "androidx.legacy", module: "legacy-support-core-utils"
+    }
 
-    testCompile 'junit:junit:4.12'
-    androidTestCompile ("com.android.support.test:runner:0.4.1") {
-        exclude module: 'support-annotations'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation('androidx.test:runner:1.1.0') {
+        exclude module: 'annotation'
+    }
+    androidTestImplementation('androidx.test:rules:1.1.0') {
+        exclude module: 'annotation'
     }
-    androidTestCompile ("com.android.support.test:rules:0.4.1") {
-        exclude module: 'support-annotations'
+
+    androidTestImplementation('androidx.test.ext:junit:1.0.0') {
+        exclude module: 'annotation'
     }
 
-    androidTestCompile ("com.android.support.test.espresso:espresso-intents:2.2.1") {
-        exclude module: 'support-annotations'
-        exclude module: 'support-v4'
-        exclude module: 'support-v13'
-        exclude module: 'recyclerview-v7'
+    androidTestImplementation('androidx.test.espresso:espresso-intents:3.1.0') {
+        exclude module: 'annotation'
+        exclude module: 'legacy-support-v4'
+        exclude module: 'legacy-support-v13'
+        exclude module: 'recyclerview'
     }
 
-    androidTestCompile ("com.android.support.test.espresso:espresso-contrib:2.2.1") {
-        exclude module: 'support-annotations'
-        exclude module: 'support-v4'
-        exclude module: 'support-v13'
-        exclude module: 'recyclerview-v7'
+    androidTestImplementation('androidx.test.espresso:espresso-contrib:3.1.0') {
+        exclude module: 'annotation'
+        exclude module: 'legacy-support-v4'
+        exclude module: 'legacy-support-v13'
+        exclude module: 'recyclerview'
     }
 
-    androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.2'
+    androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'
 }
diff --git a/app/src/androidTest/AndroidManifest.xml b/app/src/androidTest/AndroidManifest.xml
index db9bf3f..9d7fe3e 100644
--- a/app/src/androidTest/AndroidManifest.xml
+++ b/app/src/androidTest/AndroidManifest.xml
@@ -4,5 +4,5 @@
     xmlns:tools="http://schemas.android.com/tools">
     <uses-permission android:name="android.permission.SET_ANIMATION_SCALE"/>
 
-    <uses-sdk tools:overrideLibrary="android.support.test.uiautomator.v18"/>
+    <uses-sdk tools:overrideLibrary="androidx.test.uiautomator,android_libs.ub_uiautomator"/>
 </manifest>
diff --git a/app/src/androidTest/java/app/ApplicationTest.java b/app/src/androidTest/java/app/ApplicationTest.java
index e439f36..7bda243 100644
--- a/app/src/androidTest/java/app/ApplicationTest.java
+++ b/app/src/androidTest/java/app/ApplicationTest.java
@@ -3,11 +3,6 @@
 import android.content.Context;
 import android.graphics.Point;
 import android.os.RemoteException;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.espresso.matcher.BoundedMatcher;
-import android.support.test.rule.ActivityTestRule;
-import android.support.test.runner.AndroidJUnit4;
-import android.support.test.uiautomator.UiDevice;
 import android.view.Display;
 import android.view.View;
 import android.view.WindowManager;
@@ -19,12 +14,17 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import androidx.test.espresso.matcher.BoundedMatcher;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.rule.ActivityTestRule;
+import androidx.test.uiautomator.UiDevice;
 import io.victoralbertos.app.R;
 
-import static android.support.test.espresso.Espresso.onView;
-import static android.support.test.espresso.action.ViewActions.click;
-import static android.support.test.espresso.assertion.ViewAssertions.matches;
-import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.assertion.ViewAssertions.matches;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
 
 @RunWith(AndroidJUnit4.class)
 public class ApplicationTest {
@@ -123,7 +123,9 @@ private void rotateDevice() {
     }
 
     private void clickBottomMiddleScreen() {
-        WindowManager wm = (WindowManager) InstrumentationRegistry.getTargetContext().getSystemService(Context.WINDOW_SERVICE);
+        WindowManager wm = (WindowManager) InstrumentationRegistry.getInstrumentation()
+                                                 .getTargetContext()
+                                                 .getSystemService(Context.WINDOW_SERVICE);
         Display display = wm.getDefaultDisplay();
         Point size = new Point();
         display.getSize(size);
diff --git a/app/src/androidTest/java/app/MultiStartTest.java b/app/src/androidTest/java/app/MultiStartTest.java
index 687b8cf..e9fbdb9 100644
--- a/app/src/androidTest/java/app/MultiStartTest.java
+++ b/app/src/androidTest/java/app/MultiStartTest.java
@@ -1,20 +1,19 @@
 package app;
 
-import android.support.test.rule.ActivityTestRule;
-import android.support.test.runner.AndroidJUnit4;
-
-import app.multi_start.MultiStartActivity;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.rule.ActivityTestRule;
+import app.multi_start.MultiStartActivity;
 import io.victoralbertos.app.R;
 
-import static android.support.test.espresso.Espresso.onView;
-import static android.support.test.espresso.action.ViewActions.click;
-import static android.support.test.espresso.assertion.ViewAssertions.matches;
-import static android.support.test.espresso.matcher.ViewMatchers.withId;
-import static android.support.test.espresso.matcher.ViewMatchers.withText;
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.assertion.ViewAssertions.matches;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+import static androidx.test.espresso.matcher.ViewMatchers.withText;
 
 @RunWith(AndroidJUnit4.class)
 public class MultiStartTest {
diff --git a/app/src/androidTest/java/app/OnPreResultTest.java b/app/src/androidTest/java/app/OnPreResultTest.java
index 107f35a..4b7ab00 100644
--- a/app/src/androidTest/java/app/OnPreResultTest.java
+++ b/app/src/androidTest/java/app/OnPreResultTest.java
@@ -1,17 +1,18 @@
 package app;
 
-import android.support.test.rule.ActivityTestRule;
-import android.support.test.runner.AndroidJUnit4;
-import io.victoralbertos.app.R;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import static android.support.test.espresso.Espresso.onView;
-import static android.support.test.espresso.action.ViewActions.click;
-import static android.support.test.espresso.assertion.ViewAssertions.matches;
-import static android.support.test.espresso.matcher.ViewMatchers.withId;
-import static android.support.test.espresso.matcher.ViewMatchers.withText;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.rule.ActivityTestRule;
+import io.victoralbertos.app.R;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.assertion.ViewAssertions.matches;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+import static androidx.test.espresso.matcher.ViewMatchers.withText;
 
 @RunWith(AndroidJUnit4.class)
 public class OnPreResultTest {
diff --git a/app/src/main/java/app/HostActivitySampleFragment.java b/app/src/main/java/app/HostActivitySampleFragment.java
index 73d8320..6720bd6 100644
--- a/app/src/main/java/app/HostActivitySampleFragment.java
+++ b/app/src/main/java/app/HostActivitySampleFragment.java
@@ -1,7 +1,7 @@
 package app;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 
 import io.victoralbertos.app.R;
 
diff --git a/app/src/main/java/app/HostActivitySampleFragmentNested.java b/app/src/main/java/app/HostActivitySampleFragmentNested.java
index 261d85f..9810168 100644
--- a/app/src/main/java/app/HostActivitySampleFragmentNested.java
+++ b/app/src/main/java/app/HostActivitySampleFragmentNested.java
@@ -1,7 +1,7 @@
 package app;
 
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 
 import io.victoralbertos.app.R;
 
diff --git a/app/src/main/java/app/OnPreResultActivity.java b/app/src/main/java/app/OnPreResultActivity.java
index ef5a617..5e16e5f 100644
--- a/app/src/main/java/app/OnPreResultActivity.java
+++ b/app/src/main/java/app/OnPreResultActivity.java
@@ -2,7 +2,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 import android.widget.TextView;
 import app.multi_start.FirstActivity;
diff --git a/app/src/main/java/app/SampleActivity.java b/app/src/main/java/app/SampleActivity.java
index f917570..9879ee6 100644
--- a/app/src/main/java/app/SampleActivity.java
+++ b/app/src/main/java/app/SampleActivity.java
@@ -5,7 +5,7 @@
 import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.provider.MediaStore;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.widget.ImageView;
 import android.widget.Toast;
 
diff --git a/app/src/main/java/app/SampleFragment.java b/app/src/main/java/app/SampleFragment.java
index 49c7f46..6e88258 100644
--- a/app/src/main/java/app/SampleFragment.java
+++ b/app/src/main/java/app/SampleFragment.java
@@ -6,7 +6,7 @@
 import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.provider.MediaStore;
-import android.support.v4.app.Fragment;
+import androidx.fragment.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
diff --git a/app/src/main/java/app/SampleParentFragmentNested.java b/app/src/main/java/app/SampleParentFragmentNested.java
index ac3c8fb..0f05c18 100644
--- a/app/src/main/java/app/SampleParentFragmentNested.java
+++ b/app/src/main/java/app/SampleParentFragmentNested.java
@@ -5,8 +5,8 @@
 import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.provider.MediaStore;
-import android.support.annotation.Nullable;
-import android.support.v4.app.Fragment;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
diff --git a/app/src/main/java/app/StartActivity.java b/app/src/main/java/app/StartActivity.java
index a421383..d6d3ab1 100644
--- a/app/src/main/java/app/StartActivity.java
+++ b/app/src/main/java/app/StartActivity.java
@@ -2,7 +2,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 
 import app.multi_start.MultiStartActivity;
 import io.victoralbertos.app.R;
diff --git a/app/src/main/java/app/multi_start/FirstActivity.java b/app/src/main/java/app/multi_start/FirstActivity.java
index e8197f0..a35fc7a 100644
--- a/app/src/main/java/app/multi_start/FirstActivity.java
+++ b/app/src/main/java/app/multi_start/FirstActivity.java
@@ -2,7 +2,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 
 
 public class FirstActivity extends AppCompatActivity {
diff --git a/app/src/main/java/app/multi_start/MultiStartActivity.java b/app/src/main/java/app/multi_start/MultiStartActivity.java
index 39da0de..2beea46 100644
--- a/app/src/main/java/app/multi_start/MultiStartActivity.java
+++ b/app/src/main/java/app/multi_start/MultiStartActivity.java
@@ -2,7 +2,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 import android.view.View;
 import android.widget.TextView;
 
diff --git a/app/src/main/java/app/multi_start/SecondActivity.java b/app/src/main/java/app/multi_start/SecondActivity.java
index 18703d8..f79ccad 100644
--- a/app/src/main/java/app/multi_start/SecondActivity.java
+++ b/app/src/main/java/app/multi_start/SecondActivity.java
@@ -2,7 +2,7 @@
 
 import android.content.Intent;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
+import androidx.appcompat.app.AppCompatActivity;
 
 public class SecondActivity extends AppCompatActivity {
 
diff --git a/build.gradle b/build.gradle
index 54bb68b..ffd3be5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,10 +2,11 @@
 
 buildscript {
     repositories {
+        google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.3'
+        classpath 'com.android.tools.build:gradle:3.2.1'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:1.4.1'
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
@@ -14,6 +15,7 @@ buildscript {
 
 allprojects {
     repositories {
+        google()
         jcenter()
     }
 }
diff --git a/gradle.properties b/gradle.properties
index 1d3591c..c2d20e3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -15,4 +15,7 @@
 # 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
\ No newline at end of file
+# org.gradle.parallel=true
+
+android.enableJetifier=true
+android.useAndroidX=true
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 8a7af3d..5cbe1a8 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-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
diff --git a/rx_activity_result/build.gradle b/rx_activity_result/build.gradle
index 2b94fd5..fe563c7 100644
--- a/rx_activity_result/build.gradle
+++ b/rx_activity_result/build.gradle
@@ -4,8 +4,7 @@ group='com.github.VictorAlbertos'
 version='0.4.4-2.x'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.0"
+    compileSdkVersion 28
 
     defaultConfig {
         minSdkVersion 16
@@ -22,11 +21,10 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:support-fragment:25.1.1'
-    compile "io.reactivex.rxjava2:rxjava:2.0.5"
+    api "androidx.fragment:fragment:1.0.0"
+    api "io.reactivex.rxjava2:rxjava:2.2.3"
 
-    testCompile 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.12'
 }
 
 install {
diff --git a/rx_activity_result/src/main/java/rx_activity_result2/ActivitiesLifecycleCallbacks.java b/rx_activity_result/src/main/java/rx_activity_result2/ActivitiesLifecycleCallbacks.java
index c3a6784..38b3384 100644
--- a/rx_activity_result/src/main/java/rx_activity_result2/ActivitiesLifecycleCallbacks.java
+++ b/rx_activity_result/src/main/java/rx_activity_result2/ActivitiesLifecycleCallbacks.java
@@ -3,7 +3,7 @@
 import android.app.Activity;
 import android.app.Application;
 import android.os.Bundle;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 import io.reactivex.Observable;
 import io.reactivex.functions.Function;
diff --git a/rx_activity_result/src/main/java/rx_activity_result2/OnPreResult.java b/rx_activity_result/src/main/java/rx_activity_result2/OnPreResult.java
index be7e4a4..a45b37e 100644
--- a/rx_activity_result/src/main/java/rx_activity_result2/OnPreResult.java
+++ b/rx_activity_result/src/main/java/rx_activity_result2/OnPreResult.java
@@ -1,7 +1,7 @@
 package rx_activity_result2;
 
 import android.content.Intent;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 import io.reactivex.Observable;
 
 public interface OnPreResult<T> {
diff --git a/rx_activity_result/src/main/java/rx_activity_result2/OnResult.java b/rx_activity_result/src/main/java/rx_activity_result2/OnResult.java
index 4050327..9447d43 100644
--- a/rx_activity_result/src/main/java/rx_activity_result2/OnResult.java
+++ b/rx_activity_result/src/main/java/rx_activity_result2/OnResult.java
@@ -1,7 +1,7 @@
 package rx_activity_result2;
 
 import android.content.Intent;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 import java.io.Serializable;
 
diff --git a/rx_activity_result/src/main/java/rx_activity_result2/Request.java b/rx_activity_result/src/main/java/rx_activity_result2/Request.java
index 4f15393..70cba85 100644
--- a/rx_activity_result/src/main/java/rx_activity_result2/Request.java
+++ b/rx_activity_result/src/main/java/rx_activity_result2/Request.java
@@ -17,7 +17,7 @@
 package rx_activity_result2;
 
 import android.content.Intent;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 class Request {
     private final Intent intent;
diff --git a/rx_activity_result/src/main/java/rx_activity_result2/RequestIntentSender.java b/rx_activity_result/src/main/java/rx_activity_result2/RequestIntentSender.java
index c195b5e..a3815bb 100644
--- a/rx_activity_result/src/main/java/rx_activity_result2/RequestIntentSender.java
+++ b/rx_activity_result/src/main/java/rx_activity_result2/RequestIntentSender.java
@@ -19,7 +19,7 @@
 import android.content.Intent;
 import android.content.IntentSender;
 import android.os.Bundle;
-import android.support.annotation.Nullable;
+import androidx.annotation.Nullable;
 
 public class RequestIntentSender extends Request {
     private final IntentSender intentSender;
diff --git a/rx_activity_result/src/main/java/rx_activity_result2/RxActivityResult.java b/rx_activity_result/src/main/java/rx_activity_result2/RxActivityResult.java
index 617061e..1b562f1 100644
--- a/rx_activity_result/src/main/java/rx_activity_result2/RxActivityResult.java
+++ b/rx_activity_result/src/main/java/rx_activity_result2/RxActivityResult.java
@@ -21,10 +21,10 @@
 import android.content.Intent;
 import android.content.IntentSender;
 import android.os.Bundle;
-import android.support.annotation.Nullable;
-import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentActivity;
-import android.support.v4.app.FragmentManager;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentActivity;
+import androidx.fragment.app.FragmentManager;
 
 import java.util.List;