diff --git a/.travis.yml b/.travis.yml
index 0308a246..8177ed4b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,7 @@ branches:
 before_install:
 - echo no | android create avd --force -n test -t $ANDROID_TARGET --abi $ANDROID_ABI
   -c 20M
-- emulator -avd test -no-skin -no-audio -no-window &
+- emulator -avd test -no-window &
 - rm pom.xml
 - android update project -p .
 - chmod +x ./wait_for_emulator.sh
diff --git a/build.gradle b/build.gradle
index 12c4c184..c8806f38 100644
--- a/build.gradle
+++ b/build.gradle
@@ -3,7 +3,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
+        classpath 'com.android.tools.build:gradle:2.2.0'
     }
 }
 
@@ -14,7 +14,7 @@ repositories {
 }
 
 dependencies {
-    compile 'org.apache.jackrabbit:jackrabbit-webdav:2.12.2'
+    compile 'org.apache.jackrabbit:jackrabbit-webdav:2.12.4'
 }
 
 android {
diff --git a/libs/jackrabbit-webdav-2.12.2.jar b/libs/jackrabbit-webdav-2.12.4.jar
similarity index 78%
rename from libs/jackrabbit-webdav-2.12.2.jar
rename to libs/jackrabbit-webdav-2.12.4.jar
index 1be8d51a..95a44533 100644
Binary files a/libs/jackrabbit-webdav-2.12.2.jar and b/libs/jackrabbit-webdav-2.12.4.jar differ
diff --git a/test_client/build.gradle b/test_client/build.gradle
index 47e20357..bac9e894 100644
--- a/test_client/build.gradle
+++ b/test_client/build.gradle
@@ -1,12 +1,3 @@
-buildscript {
-    repositories {
-        jcenter()
-    }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:2.1.3'
-    }
-}
-
 apply plugin: 'com.android.application'