diff --git a/app/build.gradle b/app/build.gradle
index 451c6d7..bc507f7 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,12 +2,12 @@ apply plugin: 'com.android.application'
 apply plugin: 'com.getkeepsafe.dexcount'
 
 android {
-    compileSdkVersion 25
-    buildToolsVersion '25.0.3'
+    compileSdkVersion project.targetSdkVersion
+    buildToolsVersion project.buildToolsVersion
 
     defaultConfig {
-        minSdkVersion 14
-        targetSdkVersion 25
+        minSdkVersion project.minSdkVersion
+        targetSdkVersion project.targetSdkVersion
         versionName project.versionName
         vectorDrawables.useSupportLibrary = true
     }
diff --git a/build.gradle b/build.gradle
index 857add3..8a1f3fc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,8 +17,8 @@ allprojects {
 
 ext {
     minSdkVersion = 14
-    targetSdkVersion = 25
-    buildToolsVersion = '25.0.2'
+    targetSdkVersion = 26
+    buildToolsVersion = '26.0.0'
 
     versionName = '4.5.0'
     versionCode_lite = 97