diff --git a/sample_client/build.gradle b/sample_client/build.gradle
index 20889409..3518d29e 100644
--- a/sample_client/build.gradle
+++ b/sample_client/build.gradle
@@ -10,7 +10,7 @@ dependencies {
 
 android {
     compileSdkVersion 19
-    buildToolsVersion "20.0.0"
+    buildToolsVersion "22.0.1"
 
     sourceSets {
         main {
diff --git a/test_client/build.gradle b/test_client/build.gradle
index 7eab7e57..d9d8f39d 100644
--- a/test_client/build.gradle
+++ b/test_client/build.gradle
@@ -12,7 +12,7 @@ dependencies {
 
 android {
     compileSdkVersion 19
-    buildToolsVersion "20.0.0"
+    buildToolsVersion "22.0.1"
 
     sourceSets {
         main {