diff --git a/app/build.gradle b/app/build.gradle
index 6d144bb..f47271a 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -20,7 +20,7 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:21.0.3'
+    compile 'com.android.support:appcompat-v7:23.1.1'
     compile 'com.github.johnkil.print:print:1.2.2'
     compile project(':library')
 }
diff --git a/build.gradle b/build.gradle
index ebf706b..44d5582 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.0.0'
+        classpath 'com.android.tools.build:gradle:2.1.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/gradle.properties b/gradle.properties
index ddb8205..000ee40 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -22,9 +22,9 @@ VERSION_CODE=11
 
 
 ANDROID_BUILD_MIN_SDK_VERSION=11
-ANDROID_BUILD_TARGET_SDK_VERSION=21
-ANDROID_BUILD_SDK_VERSION=21
-ANDROID_BUILD_TOOLS_VERSION=21.1.2
+ANDROID_BUILD_TARGET_SDK_VERSION=23
+ANDROID_BUILD_SDK_VERSION=23
+ANDROID_BUILD_TOOLS_VERSION=23.0.3
 
 GROUP=com.github.bmelnychuk
 POM_DESCRIPTION=Tree View implementation for android
diff --git a/library/build.gradle b/library/build.gradle
index 92ecb9f..cdd1ccb 100644
--- a/library/build.gradle
+++ b/library/build.gradle
@@ -19,7 +19,7 @@ android {
 
 dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
-    compile 'com.android.support:appcompat-v7:21.0.3'
+    compile 'com.android.support:appcompat-v7:23.1.1'
 }
 
 apply from: '../maven_push.gradle'