diff --git a/app/build.gradle b/app/build.gradle
index f2c469a..cf884c7 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -2,7 +2,7 @@ apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 25
-    buildToolsVersion '25.0.0'
+    buildToolsVersion '25.0.3'
 
     testOptions {
         unitTests.returnDefaultValues = true
@@ -12,8 +12,8 @@ android {
         applicationId "org.secuso.privacyfriendlysudoku"
         minSdkVersion 16
         targetSdkVersion 25
-        versionCode 4
-        versionName "2.1.0"
+        versionCode 5
+        versionName "2.1.1"
     }
     buildTypes {
         release {
@@ -30,11 +30,11 @@ android {
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     testCompile 'junit:junit:4.12'
-    compile 'com.android.support:support-compat:25.0.0'
-    compile 'com.android.support:support-v4:25.0.0'
-    compile 'com.android.support:support-v13:25.0.0'
-    compile 'com.android.support:appcompat-v7:25.0.0'
-    compile 'com.android.support:design:25.0.0'
-    compile 'com.android.support:support-core-ui:25.0.0'
-    compile 'com.android.support:support-core-utils:25.0.0'
+    compile 'com.android.support:support-compat:25.3.1'
+    compile 'com.android.support:support-v4:25.3.1'
+    compile 'com.android.support:support-v13:25.3.1'
+    compile 'com.android.support:appcompat-v7:25.3.1'
+    compile 'com.android.support:design:25.3.1'
+    compile 'com.android.support:support-core-ui:25.3.1'
+    compile 'com.android.support:support-core-utils:25.3.1'
 }