diff --git a/build.gradle b/build.gradle
index 21d8887..fd5e680 100644
--- a/build.gradle
+++ b/build.gradle
@@ -13,3 +13,12 @@ allprojects {
         jcenter()
     }
 }
+
+ext {
+    compileSdkVersion = 23
+    targetSdkVersion = 21
+    buildToolsVersion = "23.0.1"
+    minSdkVersion = 14
+    versionCode = 13
+    versionName = "1.1.3"
+}
\ No newline at end of file
diff --git a/sample/build.gradle b/sample/build.gradle
index a21333c..39de607 100644
--- a/sample/build.gradle
+++ b/sample/build.gradle
@@ -1,15 +1,14 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 21
-    buildToolsVersion "21.1.2"
+    compileSdkVersion rootProject.ext.compileSdkVersion
+    buildToolsVersion rootProject.ext.buildToolsVersion
 
     defaultConfig {
-        applicationId "pl.aprilapps.switcher.sample"
-        minSdkVersion 14
-        targetSdkVersion 21
-        versionCode 1
-        versionName "1.0"
+        minSdkVersion rootProject.ext.minSdkVersion
+        targetSdkVersion rootProject.ext.targetSdkVersion
+        versionCode rootProject.ext.versionCode
+        versionName rootProject.ext.versionName
         renderscriptTargetApi 22
         renderscriptSupportModeEnabled true
     }
@@ -23,7 +22,7 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:21.0.3'
+    compile 'com.android.support:appcompat-v7:23.0.1'
     compile(project(':switcher-library'))
     compile 'com.jakewharton:butterknife:6.0.0'
     compile 'com.netflix.rxjava:rxjava-core:0.20.7'
diff --git a/switcher-library/build.gradle b/switcher-library/build.gradle
index 3ffbe23..5a3d666 100644
--- a/switcher-library/build.gradle
+++ b/switcher-library/build.gradle
@@ -2,14 +2,14 @@ apply plugin: 'com.android.library'
 apply plugin: 'android-maven'
 
 android {
-    compileSdkVersion 22
-    buildToolsVersion "22.0.0"
+    compileSdkVersion rootProject.ext.compileSdkVersion
+    buildToolsVersion rootProject.ext.buildToolsVersion
 
     defaultConfig {
-        minSdkVersion 14
-        targetSdkVersion 22
-        versionCode 12
-        versionName "1.1.2"
+        minSdkVersion rootProject.ext.minSdkVersion
+        targetSdkVersion rootProject.ext.targetSdkVersion
+        versionCode rootProject.ext.versionCode
+        versionName rootProject.ext.versionName
         renderscriptTargetApi 22
         renderscriptSupportModeEnabled true
     }
@@ -23,6 +23,6 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:22.1.1'
+    compile 'com.android.support:appcompat-v7:23.0.1'
 
 }
\ No newline at end of file