diff --git a/android-aac-enc/build.gradle b/android-aac-enc/build.gradle
index e55df155b..b58970b65 100644
--- a/android-aac-enc/build.gradle
+++ b/android-aac-enc/build.gradle
@@ -14,12 +14,12 @@ repositories {
 }
 
 android {
-    compileSdkVersion 17
-    buildToolsVersion "17.0.0"
+    compileSdkVersion 18
+    buildToolsVersion "18.1"
 
     defaultConfig {
         minSdkVersion 7
-        targetSdkVersion 17
+        targetSdkVersion 18
     }
 }
 
diff --git a/api/build.gradle b/api/build.gradle
index f9c213af4..483c42aee 100644
--- a/api/build.gradle
+++ b/api/build.gradle
@@ -14,12 +14,12 @@ repositories {
 }
 
 android {
-    compileSdkVersion 17
-    buildToolsVersion "17.0.0"
+    compileSdkVersion 18
+    buildToolsVersion "18.1"
 
     defaultConfig {
         minSdkVersion 7
-        targetSdkVersion 17
+        targetSdkVersion 18
     }
 }
 
diff --git a/astrid/build.gradle b/astrid/build.gradle
index 5f147b975..5c7c52a50 100644
--- a/astrid/build.gradle
+++ b/astrid/build.gradle
@@ -14,12 +14,12 @@ repositories {
 }
 
 android {
-    compileSdkVersion 17
-    buildToolsVersion "17.0.0"
+    compileSdkVersion 18
+    buildToolsVersion "18.1"
 
     defaultConfig {
         minSdkVersion 7
-        targetSdkVersion 17
+        targetSdkVersion 18
     }
 
     signingConfigs {
diff --git a/greendroid/build.gradle b/greendroid/build.gradle
index 337db82ab..4c851536b 100644
--- a/greendroid/build.gradle
+++ b/greendroid/build.gradle
@@ -14,12 +14,12 @@ repositories {
 }
 
 android {
-    compileSdkVersion 17
-    buildToolsVersion "17.0.0"
+    compileSdkVersion 18
+    buildToolsVersion "18.1"
 
     defaultConfig {
         minSdkVersion 7
-        targetSdkVersion 17
+        targetSdkVersion 18
     }
 }