diff --git a/.travis.yml b/.travis.yml
index 5131ae9a0..d50b37e38 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,10 +32,10 @@ android:
     - tools
 
     # The BuildTools version used by your project
-    - build-tools-25.0.3
+    - build-tools-26.0.1
 
     # The SDK version used to compile your project
-    - android-25
+    - android-26
 
     # Additional components
     - extra-google-google_play_services
diff --git a/Habitica/build.gradle b/Habitica/build.gradle
index cf261da75..8d81a4249 100644
--- a/Habitica/build.gradle
+++ b/Habitica/build.gradle
@@ -138,8 +138,8 @@ dependencies {
 }
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.1"
+    compileSdkVersion sdk_version
+    buildToolsVersion build_tools_version
 
     defaultConfig {
         applicationId "com.habitrpg.android.habitica"
@@ -181,6 +181,7 @@ android {
     productFlavors {
         dev {
             minSdkVersion 21
+            buildConfigField "String", "STAGING_KEY", "\"1dcf9ed3-3b14-45b3-9e7e-acdfff68a368\""
         }
 
         prod {
diff --git a/Habitica/res/layout/dialog_purchase_content_gear.xml b/Habitica/res/layout/dialog_purchase_content_gear.xml
index b43712cb9..8b7f0ba11 100644
--- a/Habitica/res/layout/dialog_purchase_content_gear.xml
+++ b/Habitica/res/layout/dialog_purchase_content_gear.xml
@@ -15,7 +15,7 @@
         android:layout_width="@dimen/shopitem_image_size"
         android:layout_height="@dimen/shopitem_image_size" />
     <TextView
-        android:id="@id/titleTextView"
+        android:id="@+id/titleTextView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         style="@style/Headline"
@@ -24,7 +24,7 @@
         android:layout_marginTop="14dp"
         android:layout_marginBottom="4dp"/>
     <TextView
-        android:id="@id/notesTextView"
+        android:id="@+id/notesTextView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         style="@style/Body2"
diff --git a/Habitica/res/layout/dialog_purchase_content_item.xml b/Habitica/res/layout/dialog_purchase_content_item.xml
index ae2e77e45..0235fb975 100644
--- a/Habitica/res/layout/dialog_purchase_content_item.xml
+++ b/Habitica/res/layout/dialog_purchase_content_item.xml
@@ -15,7 +15,7 @@
         android:layout_width="@dimen/shopitem_image_size"
         android:layout_height="@dimen/shopitem_image_size" />
     <TextView
-        android:id="@id/titleTextView"
+        android:id="@+id/titleTextView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         style="@style/Headline"
@@ -24,7 +24,7 @@
         android:layout_marginTop="14dp"
         android:layout_marginBottom="4dp"/>
     <TextView
-        android:id="@id/notesTextView"
+        android:id="@+id/notesTextView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         style="@style/Body2"
diff --git a/Habitica/res/layout/dialog_purchase_content_quest.xml b/Habitica/res/layout/dialog_purchase_content_quest.xml
index af04fe760..840a9a969 100644
--- a/Habitica/res/layout/dialog_purchase_content_quest.xml
+++ b/Habitica/res/layout/dialog_purchase_content_quest.xml
@@ -15,7 +15,7 @@
         android:layout_width="@dimen/shopitem_image_size"
         android:layout_height="@dimen/shopitem_image_size" />
     <TextView
-        android:id="@id/titleTextView"
+        android:id="@+id/titleTextView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         style="@style/Headline"
@@ -24,7 +24,7 @@
         android:layout_marginTop="14dp"
         android:layout_marginBottom="4dp"/>
     <TextView
-        android:id="@id/notesTextView"
+        android:id="@+id/notesTextView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         style="@style/Body2"
diff --git a/Habitica/res/layout/dialog_yesterdaily_task.xml b/Habitica/res/layout/dialog_yesterdaily_task.xml
index 027547d2f..c6ebf6365 100644
--- a/Habitica/res/layout/dialog_yesterdaily_task.xml
+++ b/Habitica/res/layout/dialog_yesterdaily_task.xml
@@ -47,7 +47,7 @@
         android:background="@color/gray_500"
         android:visibility="gone"/>
     <LinearLayout
-        android:id="@id/checklistView"
+        android:id="@+id/checklistView"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical"/>
diff --git a/Habitica/res/layout/item_item.xml b/Habitica/res/layout/item_item.xml
index 066949ca3..3e68c8900 100644
--- a/Habitica/res/layout/item_item.xml
+++ b/Habitica/res/layout/item_item.xml
@@ -7,7 +7,7 @@
     style="@style/RowWrapper"
     android:clickable="true">
     <com.facebook.drawee.view.SimpleDraweeView
-        android:id="@id/imageView"
+        android:id="@+id/imageView"
         android:layout_width="@dimen/gear_image_size"
         android:layout_height="@dimen/gear_image_size"
         bind:actualImageScaleType="fitCenter"
@@ -18,13 +18,13 @@
         android:orientation="vertical"
         android:layout_gravity="center_vertical">
         <TextView
-            android:id="@id/titleTextView"
+            android:id="@+id/titleTextView"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             tools:text="Title"
             style="@style/RowTitle"/>
         <TextView
-            android:id="@id/ownedTextView"
+            android:id="@+id/ownedTextView"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             tools:text="Value"
diff --git a/Habitica/res/layout/reward_item_card.xml b/Habitica/res/layout/reward_item_card.xml
index 0b947f41c..c0c381a9c 100644
--- a/Habitica/res/layout/reward_item_card.xml
+++ b/Habitica/res/layout/reward_item_card.xml
@@ -71,7 +71,7 @@
                 android:layout_height="22dp"
                 android:paddingBottom="8dp"/>
             <TextView
-                android:id="@id/priceLabel"
+                android:id="@+id/priceLabel"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:textColor="@color/yellow_10"
diff --git a/Habitica/res/layout/value_bar.xml b/Habitica/res/layout/value_bar.xml
index 8ecf30511..461a89d98 100644
--- a/Habitica/res/layout/value_bar.xml
+++ b/Habitica/res/layout/value_bar.xml
@@ -19,7 +19,7 @@
         android:contentDescription="Bar Icon"
         android:visibility="gone"/>
     <LinearLayout
-        android:id="@id/bar_full"
+        android:id="@+id/bar_full"
         android:layout_toRightOf="@id/ic_header"
         android:layout_toEndOf="@id/ic_header"
         android:layout_width="match_parent"
diff --git a/build.gradle b/build.gradle
index c73556b04..6fd6b6ed6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,6 +2,9 @@
 
 buildscript {
     ext.kotlin_version = '1.1.51'
+    ext.build_tools_version = '26.0.1'
+    ext.sdk_version = 26
+
     repositories {
         jcenter()
         maven { url "https://plugins.gradle.org/m2/" }
diff --git a/seeds-sdk/build.gradle b/seeds-sdk/build.gradle
index 44750b4b1..656e2e235 100755
--- a/seeds-sdk/build.gradle
+++ b/seeds-sdk/build.gradle
@@ -28,9 +28,8 @@ repositories {
 }
 
 android {
-    compileSdkVersion 25
-
-    buildToolsVersion "25.0.3"
+    compileSdkVersion sdk_version
+    buildToolsVersion build_tools_version
 
     defaultConfig {
         minSdkVersion 14