diff --git a/app/build.gradle b/app/build.gradle
index 5ebb03c..5d18611 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -31,8 +31,8 @@ def generateVersionName = { ->
 }
 
 android {
-    compileSdkVersion 27
-
+    compileSdkVersion 25
+    buildToolsVersion '26.0.2'
     defaultConfig {
         applicationId "org.monkey.d.ruffy.ruffy"
         minSdkVersion 19
@@ -50,8 +50,12 @@ android {
 }
 
 dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.android.support:appcompat-v7:27.1.0'
-    implementation 'com.android.support:design:27.1.0'
-    implementation 'org.apache.commons:commons-lang3:3.7'
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:25.+'
+    compile 'com.android.support:design:25.+'
+    compile 'org.apache.commons:commons-lang3:3.7'
+    testCompile 'junit:junit:4.12'
 }
diff --git a/app/src/main/res/layout/fragment_main.xml b/app/src/main/res/layout/fragment_main.xml
index c28e0c6..236bf5f 100644
--- a/app/src/main/res/layout/fragment_main.xml
+++ b/app/src/main/res/layout/fragment_main.xml
@@ -7,10 +7,16 @@
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
-    android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="org.monkey.d.ruffy.ruffy.SetupFragment"
     android:orientation="vertical">
 
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Note that when using AndroidAPS, you can not access the Combo using ruffy. AndroidAPS will start ruffy in the background as needed and needs exclusive access. Please restart your phone before using the Combo with AndroidAPS."
+        android:layout_marginTop="5dp"
+        android:layout_marginBottom="5dp"/>
+
     <TextView
         android:id="@+id/main_log"
         style="@style/Base.TextAppearance.AppCompat.Medium.Inverse"
diff --git a/build.gradle b/build.gradle
index 44bac8f..7e01a0a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.2'
+        classpath 'com.android.tools.build:gradle:3.0.1'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files