diff --git a/Makefile b/Makefile
index db6e5a93..8767e880 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,7 @@ release: clean
 
 clean:
 	rm -rf ./app/build
+	rm -rf ./libs ; git checkout libs
 
 uninstall:
 	adb uninstall ch.blinkenlights.android.vanilla
diff --git a/app/build.gradle b/app/build.gradle
index 5146c89e..c46da635 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -6,12 +6,12 @@ android {
         disable 'ExtraTranslation'
     }
 
-    compileSdkVersion 28
+    compileSdkVersion rootProject.ext.compileSdkVersion
 
     defaultConfig {
         applicationId "ch.blinkenlights.android.vanilla"
-        minSdkVersion 15
-        targetSdkVersion 28
+        minSdkVersion rootProject.ext.minSdkVersion
+        targetSdkVersion rootProject.ext.targetSdkVersion
     }
 
     buildTypes {
@@ -29,6 +29,7 @@ android {
 
 dependencies {
     implementation 'com.android.support:support-core-ui:28.0.0'
+    implementation project(':dialogplus')
     compileOnly 'com.android.support:support-annotations:28.0.0'
     compileOnly 'junit:junit:4.12'
 }
diff --git a/build.gradle b/build.gradle
index 66feddae..35f82633 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-		classpath 'com.android.tools.build:gradle:3.1.3'
+    classpath 'com.android.tools.build:gradle:3.1.3'
     }
 }
 allprojects {
@@ -13,3 +13,8 @@ allprojects {
         jcenter()
     }
 }
+ext {
+    compileSdkVersion = 28
+    targetSdkVersion = 28
+    minSdkVersion = 15
+}
diff --git a/settings.gradle b/settings.gradle
index af1a9988..34c471ad 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1 +1,4 @@
-include ":app"
+include "app"
+include "dialogplus"
+
+project(':dialogplus').projectDir = new File('./libs/dialogplus/dialogplus')