diff --git a/app/build.gradle b/app/build.gradle
index 4fbf56f..2beaa1d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -16,20 +16,20 @@ if (file('signing.gradle').exists()) {
 ext {
   okHttpVersion = '3.5.0'
   retrofitVersion = '2.1.0'
-  supportLibraryVersion = '25.0.1'
+  supportLibraryVersion = '1.0.0-beta01'
 }
 
 
 android {
-  compileSdkVersion 25
-  buildToolsVersion "25.0.2"
+  compileSdkVersion 28
+  buildToolsVersion "25.0.3"
   defaultConfig {
     applicationId "com.thoughtbot.tropos"
     minSdkVersion 19
-    targetSdkVersion 25
+    targetSdkVersion 28
     versionCode 6
     versionName "1.1"
-    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
   }
 
   signingConfigs {
@@ -75,9 +75,9 @@ dependencies {
   compile 'org.jetbrains.anko:anko-common:0.8.3'
 
   //android
-  compile "com.android.support:appcompat-v7:${supportLibraryVersion}"
-  compile "com.android.support:design:${supportLibraryVersion}"
-  compile "com.android.support:recyclerview-v7:${supportLibraryVersion}"
+  compile "androidx.appcompat:appcompat:${supportLibraryVersion}"
+  compile "com.google.android.material:material:${supportLibraryVersion}"
+  compile "androidx.recyclerview:recyclerview:${supportLibraryVersion}"
   compile 'com.google.android.gms:play-services-location:10.0.0'
 
   //unit tests
@@ -90,9 +90,9 @@ dependencies {
   testCompile "com.nhaarman:mockito-kotlin:1.1.0"
 
   //automation tests
-  androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
-  androidTestCompile 'com.android.support.test:runner:0.5'
-  androidTestCompile "com.android.support:support-annotations:${supportLibraryVersion}"
+  androidTestCompile 'androidx.test.espresso:espresso-core:3.1.0-alpha4'
+  androidTestCompile 'androidx.test:runner:1.1.0-alpha4'
+  androidTestCompile "androidx.annotation:annotation:${supportLibraryVersion}"
 
   //networking
   compile "com.squareup.retrofit2:retrofit:${retrofitVersion}"
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/adapters/WeatherAdapter.kt b/app/src/main/kotlin/com/thoughtbot/tropos/adapters/WeatherAdapter.kt
index 650ffd4..13b0370 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/adapters/WeatherAdapter.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/adapters/WeatherAdapter.kt
@@ -1,8 +1,8 @@
 package com.thoughtbot.tropos.adapters
 
-import android.support.v7.widget.GridLayoutManager.SpanSizeLookup
-import android.support.v7.widget.RecyclerView.Adapter
-import android.support.v7.widget.RecyclerView.ViewHolder
+import androidx.recyclerview.widget.GridLayoutManager.SpanSizeLookup
+import androidx.recyclerview.widget.RecyclerView.Adapter
+import androidx.recyclerview.widget.RecyclerView.ViewHolder
 import android.view.LayoutInflater.from
 import android.view.ViewGroup
 import com.thoughtbot.tropos.R.layout
@@ -25,21 +25,21 @@ class WeatherAdapter : Adapter<ViewHolder>() {
     }
   }
 
-  override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): ViewHolder {
+  override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
     when (viewType) {
       layout.grid_item_current_weather -> {
-        val view = from(parent!!.context).inflate(layout.grid_item_current_weather, parent, false)
+        val view = from(parent.context).inflate(layout.grid_item_current_weather, parent, false)
         return CurrentWeatherViewHolder(view)
       }
       layout.grid_item_forecast -> {
-        val view = from(parent!!.context).inflate(layout.grid_item_forecast, parent, false)
+        val view = from(parent.context).inflate(layout.grid_item_forecast, parent, false)
         return ForecastViewHolder(view)
       }
       else -> throw IllegalArgumentException("$viewType is not a valid viewType")
     }
   }
 
-  override fun onBindViewHolder(holder: ViewHolder?, position: Int) {
+  override fun onBindViewHolder(holder: ViewHolder, position: Int) {
     when (holder) {
       is CurrentWeatherViewHolder -> weather?.let { holder.bind(it.today, it.yesterday) }
       is ForecastViewHolder -> weather?.let { holder.bind(forecast(it, position)) }
@@ -68,4 +68,4 @@ class WeatherAdapter : Adapter<ViewHolder>() {
     return weather.nextThreeDays[position - 1]
   }
 
-}
\ No newline at end of file
+}
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/commons/BaseActivity.kt b/app/src/main/kotlin/com/thoughtbot/tropos/commons/BaseActivity.kt
index 26fa90b..46e9e6c 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/commons/BaseActivity.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/commons/BaseActivity.kt
@@ -2,7 +2,7 @@ package com.thoughtbot.tropos.commons
 
 import android.content.Context
 import android.os.Bundle
-import android.support.v7.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatActivity
 import com.thoughtbot.tropos.R
 import uk.co.chrisjenx.calligraphy.CalligraphyConfig
 import uk.co.chrisjenx.calligraphy.CalligraphyContextWrapper
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/extensions/ContextExtensions.kt b/app/src/main/kotlin/com/thoughtbot/tropos/extensions/ContextExtensions.kt
index c85cc10..da84247 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/extensions/ContextExtensions.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/extensions/ContextExtensions.kt
@@ -3,7 +3,7 @@ package com.thoughtbot.tropos.extensions
 import android.content.Context
 import android.content.SharedPreferences
 import android.content.pm.PackageManager
-import android.support.v4.content.ContextCompat
+import androidx.core.content.ContextCompat
 
 fun Context.hasPermission(permission: String): Boolean {
   return ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/extensions/ViewExtensions.kt b/app/src/main/kotlin/com/thoughtbot/tropos/extensions/ViewExtensions.kt
index 7cff766..28c695d 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/extensions/ViewExtensions.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/extensions/ViewExtensions.kt
@@ -1,8 +1,8 @@
 package com.thoughtbot.tropos.extensions
 
 import android.graphics.Color
-import android.support.v7.widget.RecyclerView
-import android.support.v7.widget.SnapHelper
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.SnapHelper
 import android.text.Spannable
 import android.text.SpannableStringBuilder
 import android.text.style.ForegroundColorSpan
@@ -24,6 +24,6 @@ fun String.colorSubString(subString: String, color: Int): SpannableStringBuilder
   return stringBuilder
 }
 
-fun RecyclerView.attachSnapHelper(snapHelper: SnapHelper) {
+fun androidx.recyclerview.widget.RecyclerView.attachSnapHelper(snapHelper: androidx.recyclerview.widget.SnapHelper) {
   snapHelper.attachToRecyclerView(this)
 }
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/permissions/PermissionExtensions.kt b/app/src/main/kotlin/com/thoughtbot/tropos/permissions/PermissionExtensions.kt
index 4869b94..824482f 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/permissions/PermissionExtensions.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/permissions/PermissionExtensions.kt
@@ -2,7 +2,7 @@ package com.thoughtbot.tropos.permissions
 
 import android.app.Activity
 import android.content.pm.PackageManager
-import android.support.v4.app.ActivityCompat
+import androidx.core.app.ActivityCompat
 import android.util.Log
 
 fun Activity.getPermissionResults(permission: Permission, results: PermissionResults,
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/refresh/DiagonalStripeView.kt b/app/src/main/kotlin/com/thoughtbot/tropos/refresh/DiagonalStripeView.kt
index c2b167c..8699451 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/refresh/DiagonalStripeView.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/refresh/DiagonalStripeView.kt
@@ -5,7 +5,7 @@ import android.graphics.Bitmap
 import android.graphics.Canvas
 import android.graphics.Paint
 import android.graphics.Point
-import android.support.v4.content.ContextCompat
+import androidx.core.content.ContextCompat
 import android.util.AttributeSet
 import android.view.View
 import android.view.WindowManager
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/refresh/ProgressCircleDrawable.kt b/app/src/main/kotlin/com/thoughtbot/tropos/refresh/ProgressCircleDrawable.kt
index aa65a93..3e5de06 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/refresh/ProgressCircleDrawable.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/refresh/ProgressCircleDrawable.kt
@@ -14,7 +14,7 @@ import android.graphics.RectF
 import android.graphics.Region.Op
 import android.graphics.drawable.Animatable
 import android.graphics.drawable.Drawable
-import android.support.v4.content.ContextCompat
+import androidx.core.content.ContextCompat
 import com.thoughtbot.tropos.R
 
 class ProgressCircleDrawable(context: Context) : Drawable(), Animatable {
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/refresh/PullToRefreshLayout.kt b/app/src/main/kotlin/com/thoughtbot/tropos/refresh/PullToRefreshLayout.kt
index 9ee9918..a6c8131 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/refresh/PullToRefreshLayout.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/refresh/PullToRefreshLayout.kt
@@ -2,10 +2,10 @@ package com.thoughtbot.tropos.refresh
 
 import android.content.Context
 import android.graphics.drawable.Drawable
-import android.support.v4.view.MotionEventCompat
-import android.support.v4.view.NestedScrollingChildHelper
-import android.support.v4.view.NestedScrollingParentHelper
-import android.support.v4.view.ViewCompat
+import androidx.core.view.MotionEventCompat
+import androidx.core.view.NestedScrollingChildHelper
+import androidx.core.view.NestedScrollingParentHelper
+import androidx.core.view.ViewCompat
 import android.util.AttributeSet
 import android.view.MotionEvent
 import android.view.View
@@ -17,6 +17,7 @@ import android.view.animation.Animation
 import android.view.animation.DecelerateInterpolator
 import android.view.animation.Transformation
 import android.widget.AbsListView
+import java.lang.RuntimeException
 
 class PullToRefreshLayout : ViewGroup, Animation.AnimationListener {
 
@@ -408,9 +409,9 @@ class PullToRefreshLayout : ViewGroup, Animation.AnimationListener {
   override fun requestDisallowInterceptTouchEvent(b: Boolean) {
     // if this is a List < L or another view that doesn't support nested
     // scrolling, ignore this request so that the vertical scroll event
-    // isn't stolen
+    // isn't stole
     if (android.os.Build.VERSION.SDK_INT < 21 && target is AbsListView || target != null && !ViewCompat.isNestedScrollingEnabled(
-        target)) {
+            target!!)) {
       // Nope.
     } else {
       super.requestDisallowInterceptTouchEvent(b)
@@ -565,4 +566,4 @@ class PullToRefreshLayout : ViewGroup, Animation.AnimationListener {
   override fun onAnimationStart(animation: Animation?) {}
 
   override fun onAnimationRepeat(animation: Animation?) {}
-}
\ No newline at end of file
+}
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/refresh/RefreshDrawable.kt b/app/src/main/kotlin/com/thoughtbot/tropos/refresh/RefreshDrawable.kt
index 3465321..348601c 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/refresh/RefreshDrawable.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/refresh/RefreshDrawable.kt
@@ -9,7 +9,7 @@ import android.graphics.Rect
 import android.graphics.Region
 import android.graphics.drawable.Drawable
 import android.graphics.drawable.LayerDrawable
-import android.support.v4.graphics.drawable.DrawableCompat
+import androidx.core.graphics.drawable.DrawableCompat
 import com.thoughtbot.tropos.refresh.PullToRefreshLayout.ProgressStateListener
 import com.thoughtbot.tropos.refresh.PullToRefreshLayout.ProgressStateListener.Companion.INACTIVE
 import com.thoughtbot.tropos.refresh.PullToRefreshLayout.ProgressStateListener.Companion.PROGRESSING
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/scrolling/RecyclerViewScroller.kt b/app/src/main/kotlin/com/thoughtbot/tropos/scrolling/RecyclerViewScroller.kt
index ae2f53b..d473586 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/scrolling/RecyclerViewScroller.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/scrolling/RecyclerViewScroller.kt
@@ -1,25 +1,25 @@
 package com.thoughtbot.tropos.scrolling
 
-import android.support.v7.widget.LinearLayoutManager
-import android.support.v7.widget.RecyclerView
-import android.support.v7.widget.RecyclerView.OnItemTouchListener
-import android.support.v7.widget.StaggeredGridLayoutManager
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.OnItemTouchListener
+import androidx.recyclerview.widget.StaggeredGridLayoutManager
 import android.view.MotionEvent
 import com.thoughtbot.tropos.scrolling.OverScroller.OverScrollDirection.END
 
-class RecyclerViewScroller(override val view: RecyclerView) : Scroller {
+class RecyclerViewScroller(override val view: androidx.recyclerview.widget.RecyclerView) : Scroller {
 
   val layoutManager = view.layoutManager
-  val orientation = (layoutManager as? LinearLayoutManager)?.orientation ?: (layoutManager as StaggeredGridLayoutManager).orientation
+  val orientation = (layoutManager as? androidx.recyclerview.widget.LinearLayoutManager)?.orientation ?: (layoutManager as androidx.recyclerview.widget.StaggeredGridLayoutManager).orientation
 
   init {
-    if (layoutManager !is LinearLayoutManager && layoutManager !is StaggeredGridLayoutManager) {
+    if (layoutManager !is androidx.recyclerview.widget.LinearLayoutManager && layoutManager !is androidx.recyclerview.widget.StaggeredGridLayoutManager) {
       throw IllegalArgumentException("Recycler views with custom layout managers are not supported")
     }
   }
 
   override fun isInAbsoluteStart(): Boolean {
-    if (orientation == LinearLayoutManager.HORIZONTAL) {
+    if (orientation == androidx.recyclerview.widget.LinearLayoutManager.HORIZONTAL) {
       return !view.canScrollHorizontally(-1)
     } else {
       return !view.canScrollVertically(-1)
@@ -27,7 +27,7 @@ class RecyclerViewScroller(override val view: RecyclerView) : Scroller {
   }
 
   override fun isInAbsoluteEnd(): Boolean {
-    if (orientation == LinearLayoutManager.HORIZONTAL) {
+    if (orientation == androidx.recyclerview.widget.LinearLayoutManager.HORIZONTAL) {
       return !view.canScrollHorizontally(1)
     } else {
       return !view.canScrollVertically(1)
@@ -36,17 +36,17 @@ class RecyclerViewScroller(override val view: RecyclerView) : Scroller {
 
 }
 
-fun RecyclerView.setVerticalEndOverScroller() {
+fun androidx.recyclerview.widget.RecyclerView.setVerticalEndOverScroller() {
   val overScroller = VerticalOverScroller(RecyclerViewScroller(this), END)
   addOnItemTouchListener(object : OnItemTouchListener {
-    override fun onTouchEvent(rv: RecyclerView?, e: MotionEvent?) {
+    override fun onTouchEvent(rv: androidx.recyclerview.widget.RecyclerView, e: MotionEvent) {
       overScroller.onTouch(rv, e)
     }
 
-    override fun onInterceptTouchEvent(rv: RecyclerView?, e: MotionEvent?): Boolean {
+    override fun onInterceptTouchEvent(rv: androidx.recyclerview.widget.RecyclerView, e: MotionEvent): Boolean {
       return overScroller.onTouch(rv, e)
     }
 
     override fun onRequestDisallowInterceptTouchEvent(disallowIntercept: Boolean) {}
   })
-}
\ No newline at end of file
+}
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/scrolling/WeatherSnapHelper.kt b/app/src/main/kotlin/com/thoughtbot/tropos/scrolling/WeatherSnapHelper.kt
index d34ac5a..4615186 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/scrolling/WeatherSnapHelper.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/scrolling/WeatherSnapHelper.kt
@@ -1,10 +1,10 @@
 package com.thoughtbot.tropos.scrolling
 
-import android.support.v7.widget.LinearLayoutManager
-import android.support.v7.widget.LinearSnapHelper
-import android.support.v7.widget.OrientationHelper
-import android.support.v7.widget.RecyclerView
-import android.support.v7.widget.RecyclerView.LayoutManager
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.LinearSnapHelper
+import androidx.recyclerview.widget.OrientationHelper
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.LayoutManager
 import android.view.View
 
 /**
@@ -14,18 +14,18 @@ import android.view.View
  * The implementation will snap to either completely show or hide the {@link ForecastViewHolder}
  * depending on how much of it is visible on when user releases their touch
  **/
-class WeatherSnapHelper : LinearSnapHelper() {
+class WeatherSnapHelper : androidx.recyclerview.widget.LinearSnapHelper() {
 
   override fun findSnapView(layoutManager: LayoutManager?): View? {
-    layoutManager as LinearLayoutManager
+    layoutManager as androidx.recyclerview.widget.LinearLayoutManager
 
     val lastChildIndex = layoutManager.findLastVisibleItemPosition()
-    if (lastChildIndex == RecyclerView.NO_POSITION) {
+    if (lastChildIndex == androidx.recyclerview.widget.RecyclerView.NO_POSITION) {
       return null
     }
 
     val lastChild = layoutManager.findViewByPosition(lastChildIndex)
-    val orientationHelper = OrientationHelper.createVerticalHelper(layoutManager)
+    val orientationHelper = androidx.recyclerview.widget.OrientationHelper.createVerticalHelper(layoutManager)
     val lastChildStart = orientationHelper.getDecoratedStart(lastChild)
     val lastChildHeight = orientationHelper.getDecoratedMeasurement(lastChild)
     val recyclerViewHeight = layoutManager.height
@@ -46,8 +46,8 @@ class WeatherSnapHelper : LinearSnapHelper() {
     out[0] = 0
 
     val targetViewType = layoutManager.getItemViewType(target)
-    val weatherViewType = layoutManager.getItemViewType(layoutManager.findViewByPosition(0))
-    val orientationHelper = OrientationHelper.createVerticalHelper(layoutManager)
+    val weatherViewType = layoutManager.getItemViewType(layoutManager.findViewByPosition(0)!!)
+    val orientationHelper = androidx.recyclerview.widget.OrientationHelper.createVerticalHelper(layoutManager)
 
     if (targetViewType == weatherViewType) {
       // snap to show weather
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/settings/SettingsActivity.kt b/app/src/main/kotlin/com/thoughtbot/tropos/settings/SettingsActivity.kt
index f6bb32f..c9a4813 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/settings/SettingsActivity.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/settings/SettingsActivity.kt
@@ -2,8 +2,8 @@ package com.thoughtbot.tropos.settings
 
 import android.content.Context
 import android.os.Bundle
-import android.support.v4.app.ActivityCompat
-import android.support.v7.widget.Toolbar
+import androidx.core.app.ActivityCompat
+import androidx.appcompat.widget.Toolbar
 import android.view.Menu
 import android.view.MenuItem
 import com.thoughtbot.tropos.R
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/splash/SplashActivity.kt b/app/src/main/kotlin/com/thoughtbot/tropos/splash/SplashActivity.kt
index d07061d..be5d917 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/splash/SplashActivity.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/splash/SplashActivity.kt
@@ -3,7 +3,7 @@ package com.thoughtbot.tropos.splash
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
-import android.support.v4.app.ActivityCompat.finishAfterTransition
+import androidx.core.app.ActivityCompat.finishAfterTransition
 import com.thoughtbot.tropos.R
 import com.thoughtbot.tropos.commons.BaseActivity
 import com.thoughtbot.tropos.permissions.getPermissionResults
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/transitions/CircularReveal.kt b/app/src/main/kotlin/com/thoughtbot/tropos/transitions/CircularReveal.kt
index bde2d54..d8a6e7f 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/transitions/CircularReveal.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/transitions/CircularReveal.kt
@@ -4,7 +4,7 @@ import android.R.attr
 import android.animation.Animator
 import android.content.Context
 import android.graphics.Point
-import android.support.annotation.IdRes
+import androidx.annotation.IdRes
 import android.transition.TransitionValues
 import android.transition.Visibility
 import android.util.AttributeSet
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/ui/MainActivity.kt b/app/src/main/kotlin/com/thoughtbot/tropos/ui/MainActivity.kt
index fd96b4e..4a0f8c6 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/ui/MainActivity.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/ui/MainActivity.kt
@@ -3,10 +3,10 @@ package com.thoughtbot.tropos.ui
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
-import android.support.v4.app.ActivityOptionsCompat
-import android.support.v7.widget.GridLayoutManager
-import android.support.v7.widget.RecyclerView
-import android.support.v7.widget.Toolbar
+import androidx.core.app.ActivityOptionsCompat
+import androidx.recyclerview.widget.GridLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import androidx.appcompat.widget.Toolbar
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
@@ -40,9 +40,11 @@ class MainActivity : BaseActivity(), MainView {
   }
 
   val presenter: MainPresenter by lazy { MainPresenter(this, intent) }
-  val recyclerView: RecyclerView by lazy { findViewById(R.id.recycler_view) as RecyclerView }
+  val recyclerView: androidx.recyclerview.widget.RecyclerView by lazy { findViewById(R.id.recycler_view) as androidx.recyclerview.widget.RecyclerView }
   val adapter: WeatherAdapter by lazy { WeatherAdapter() }
-  val layoutManager: GridLayoutManager by lazy { GridLayoutManager(this, 3) }
+  val layoutManager: androidx.recyclerview.widget.GridLayoutManager by lazy {
+    androidx.recyclerview.widget.GridLayoutManager(this, 3)
+  }
   val pullToRefreshLayout  by lazy { find<PullToRefreshLayout>(R.id.pull_to_refresh) }
 
   override fun onCreate(savedInstanceState: Bundle?) {
@@ -104,7 +106,7 @@ class MainActivity : BaseActivity(), MainView {
         toolbar_last_update.text = it.toolbarViewModel.subtitle()
 
         adapter.weather = it.weather
-        recyclerView.itemAnimator.isRunning {
+        recyclerView.itemAnimator?.isRunning {
           pullToRefreshLayout.setRefreshing(false)
         }
 
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/viewholders/CurrentWeatherViewHolder.kt b/app/src/main/kotlin/com/thoughtbot/tropos/viewholders/CurrentWeatherViewHolder.kt
index 3592cc8..e0e700c 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/viewholders/CurrentWeatherViewHolder.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/viewholders/CurrentWeatherViewHolder.kt
@@ -1,6 +1,6 @@
 package com.thoughtbot.tropos.viewholders
 
-import android.support.v7.widget.RecyclerView.ViewHolder
+import androidx.recyclerview.widget.RecyclerView.ViewHolder
 import android.view.View
 import android.widget.ImageView
 import android.widget.TextView
@@ -10,7 +10,7 @@ import com.thoughtbot.tropos.viewmodels.CurrentWeatherViewModel
 import com.thoughtbot.tropos.widgets.DrawableTextLabel
 import org.jetbrains.anko.find
 
-class CurrentWeatherViewHolder(itemView: View?) : ViewHolder(itemView) {
+class CurrentWeatherViewHolder(itemView: View) : ViewHolder(itemView) {
 
   fun bind(today: Condition, yesterday: Condition) {
     val viewModel = CurrentWeatherViewModel(itemView.context, today = today, yesterday = yesterday)
@@ -23,4 +23,4 @@ class CurrentWeatherViewHolder(itemView: View?) : ViewHolder(itemView) {
     itemView.find<DrawableTextLabel>(id.wind_label).setDrawable(viewModel.windIcon)
   }
 
-}
\ No newline at end of file
+}
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/viewholders/ForecastViewHolder.kt b/app/src/main/kotlin/com/thoughtbot/tropos/viewholders/ForecastViewHolder.kt
index 0c6426b..2003197 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/viewholders/ForecastViewHolder.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/viewholders/ForecastViewHolder.kt
@@ -1,13 +1,13 @@
 package com.thoughtbot.tropos.viewholders
 
-import android.support.v7.widget.RecyclerView
-import android.support.v7.widget.RecyclerView.ViewHolder
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.ViewHolder
 import android.view.View
 import com.thoughtbot.tropos.data.Condition
 import com.thoughtbot.tropos.viewmodels.ForecastViewModel
 import com.thoughtbot.tropos.widgets.ForecastLayout
 
-class ForecastViewHolder(itemView: View?) : ViewHolder(itemView) {
+class ForecastViewHolder(itemView: View) : ViewHolder(itemView) {
 
   fun bind(condition: Condition) {
     val viewModel = ForecastViewModel(itemView.context, condition = condition)
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/viewmodels/CurrentWeatherViewModel.kt b/app/src/main/kotlin/com/thoughtbot/tropos/viewmodels/CurrentWeatherViewModel.kt
index 303ef86..225a543 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/viewmodels/CurrentWeatherViewModel.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/viewmodels/CurrentWeatherViewModel.kt
@@ -1,7 +1,7 @@
 package com.thoughtbot.tropos.viewmodels
 
 import android.content.Context
-import android.support.v4.content.ContextCompat.getColor
+import androidx.core.content.ContextCompat.getColor
 import android.text.SpannableStringBuilder
 import com.thoughtbot.tropos.R
 import com.thoughtbot.tropos.R.color
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/widgets/DrawableTextLabel.kt b/app/src/main/kotlin/com/thoughtbot/tropos/widgets/DrawableTextLabel.kt
index 19bc654..a8e00f2 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/widgets/DrawableTextLabel.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/widgets/DrawableTextLabel.kt
@@ -3,7 +3,7 @@ package com.thoughtbot.tropos.widgets
 import android.content.Context
 import android.content.res.TypedArray
 import android.graphics.drawable.Drawable
-import android.support.annotation.DrawableRes
+import androidx.annotation.DrawableRes
 import android.text.SpannableStringBuilder
 import android.util.AttributeSet
 import android.view.LayoutInflater
diff --git a/app/src/main/kotlin/com/thoughtbot/tropos/widgets/ForecastLayout.kt b/app/src/main/kotlin/com/thoughtbot/tropos/widgets/ForecastLayout.kt
index 29ce328..f3d123f 100644
--- a/app/src/main/kotlin/com/thoughtbot/tropos/widgets/ForecastLayout.kt
+++ b/app/src/main/kotlin/com/thoughtbot/tropos/widgets/ForecastLayout.kt
@@ -1,7 +1,7 @@
 package com.thoughtbot.tropos.widgets
 
 import android.content.Context
-import android.support.annotation.DrawableRes
+import androidx.annotation.DrawableRes
 import android.util.AttributeSet
 import android.view.LayoutInflater
 import android.widget.ImageView
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 285d300..c57c8bb 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -9,7 +9,7 @@
   android:fitsSystemWindows="true"
   android:orientation="vertical">
 
-  <android.support.v7.widget.Toolbar
+  <androidx.appcompat.widget.Toolbar
     android:id="@+id/toolbar"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
@@ -45,7 +45,7 @@
         tools:ignore="MissingPrefix" />
     </LinearLayout>
 
-  </android.support.v7.widget.Toolbar>
+  </androidx.appcompat.widget.Toolbar>
 
   <FrameLayout
     android:layout_width="match_parent"
@@ -100,7 +100,7 @@
       android:layout_width="match_parent"
       android:layout_height="match_parent">
 
-      <android.support.v7.widget.RecyclerView
+      <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
@@ -111,4 +111,4 @@
   </FrameLayout>
 
 
-</LinearLayout>
\ No newline at end of file
+</LinearLayout>
diff --git a/app/src/main/res/layout/activity_settings.xml b/app/src/main/res/layout/activity_settings.xml
index 1d92ac0..e50ad42 100644
--- a/app/src/main/res/layout/activity_settings.xml
+++ b/app/src/main/res/layout/activity_settings.xml
@@ -7,7 +7,7 @@
   android:fitsSystemWindows="true"
   android:orientation="vertical">
 
-  <android.support.v7.widget.Toolbar
+  <androidx.appcompat.widget.Toolbar
     android:id="@+id/settings_toolbar"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
@@ -90,4 +90,4 @@
 
   </RelativeLayout>
 
-</LinearLayout>
\ No newline at end of file
+</LinearLayout>
diff --git a/build.gradle b/build.gradle
index 53ca5e7..8447a5b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,13 +1,17 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-  ext.kotlin_version = '1.0.6'
+  ext.kotlin_version = '1.3.21'
 
   repositories {
     jcenter()
+    maven {
+      url 'https://maven.google.com/'
+      name 'Google'
+    }
   }
   dependencies {
-    classpath 'com.android.tools.build:gradle:2.2.3'
+    classpath 'com.android.tools.build:gradle:3.3.2'
     classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
 
@@ -19,6 +23,10 @@ buildscript {
 allprojects {
   repositories {
     jcenter()
+    maven {
+      url 'https://maven.google.com/'
+      name 'Google'
+    }
   }
 }
 
diff --git a/gradle.properties b/gradle.properties
index aac7c9b..9e6fce1 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -9,6 +9,8 @@
 
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
+android.enableJetifier=true
+android.useAndroidX=true
 org.gradle.jvmargs=-Xmx1536m
 
 # When configured, Gradle will run in incubating parallel mode.
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 04e285f..51ad40e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Mon Dec 28 10:00:20 PST 2015
+#Fri Apr 12 12:29:18 GMT-05:00 2019
 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-4.10.1-all.zip