diff --git a/.travis.yml b/.travis.yml
index 7e3db2a03..f5bd81060 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,10 @@
 language: java
+jdk:
+  - openjdk8
 
-script: ./gradlew check
-after_success: ./gradlew aggregatedJavadocs
+script:
+  - ./gradlew check
+  - ./gradlew aggregatedJavadocs
 
 deploy:
   provider: pages
diff --git a/build.gradle b/build.gradle
index b0cdf7114..3d8ced48b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ allprojects {
     sourceCompatibility = 1.7
     targetCompatibility = 1.7
 
-    version 'v0.13.0'
+    version 'v0.18.0'
     group 'com.github.TeamNewPipe'
 
     repositories {
@@ -43,7 +43,8 @@ task aggregatedJavadocs(type: Javadoc, group: 'Documentation') {
     title = "$project.name $version"
     // options.memberLevel = JavadocMemberLevel.PRIVATE
     options.links 'https://docs.oracle.com/javase/7/docs/api/'
-    
+    options.encoding 'UTF-8'
+
     subprojects.each { project ->
         project.tasks.withType(Javadoc).each { javadocTask ->
             source += javadocTask.source