diff --git a/build.gradle b/build.gradle
index 800016a..ec2543b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,8 +2,8 @@ apply plugin: 'com.android.library'
 apply plugin: 'me.tatarka.retrolambda'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion '25.0.3'
+    compileSdkVersion 26
+    buildToolsVersion buildTools
 
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
@@ -18,9 +18,9 @@ android {
 dependencies {
     compile project(':libraries:core')
 
-    provided 'com.android.support:appcompat-v7:25.4.0'
-    provided 'com.android.support:recyclerview-v7:25.4.0'
+    provided "com.android.support:appcompat-v7:$supportLibraryVersion"
+    provided "com.android.support:recyclerview-v7:$supportLibraryVersion"
 
-    provided 'io.reactivex:rxandroid:1.2.1'
-    provided 'io.reactivex:rxjava:1.3.2'
+    provided "io.reactivex:rxandroid:$rxAndroidVersion"
+    provided "io.reactivex:rxjava:$rxJavaVersion"
 }