diff --git a/build.gradle b/build.gradle
index 6b5783b..4bd4938 100644
--- a/build.gradle
+++ b/build.gradle
@@ -2,10 +2,10 @@
 plugins {
     id "org.sonarqube" version "2.6.1"
     id "io.codearte.nexus-staging" version "0.11.0"
-    id "org.xbib.gradle.plugin.asciidoctor" version "1.5.6.0.1"
+    id "org.xbib.gradle.plugin.asciidoctor" version "1.6.0.0"
 }
 
-printf "Host: %s\nOS: %s %s %s\nJVM: %s %s %s %s\n\nGradle: %s Groovy: %s Java: %s\n" +
+printf "Host: %s\nOS: %s %s %s\nJVM: %s %s %s %s\nGradle: %s Groovy: %s Java: %s\n" +
         "Build: group: ${project.group} name: ${project.name} version: ${project.version}\n",
         InetAddress.getLocalHost(),
         System.getProperty("os.name"),
@@ -47,12 +47,12 @@ allprojects {
         wagon "org.apache.maven.wagon:wagon-ssh:${project.property('wagon.version')}"
     }
 
-    sourceCompatibility = JavaVersion.VERSION_1_8
+    sourceCompatibility = JavaVersion.VERSION_1_9
     targetCompatibility = JavaVersion.VERSION_1_8
 
     [compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
     tasks.withType(JavaCompile) {
-        options.compilerArgs << "-Xlint:all" << "-profile" << "compact1"
+        options.compilerArgs << "-Xlint:all" << "--release" << "8"// << "-profile" << "compact1"
     }
 
     jar {
diff --git a/gradle.properties b/gradle.properties
index bb7c8e1..a822a99 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,5 +6,5 @@ xbib-net.version = 1.0.0
 jackson.version = 2.8.11
 junit.version = 4.12
 hamcrest.version = 1.3
-mockito.version = 2.13.0
+mockito.version = 2.15.0
 wagon.version = 3.0.0
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index c44b679..8252d7e 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 6e8d417..6f83a67 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Tue Feb 06 23:13:29 CET 2018
+#Wed Feb 21 09:12:23 CET 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-rc-1-all.zip