diff --git a/.travis.yml b/.travis.yml
index a93a6d59..1686522b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -38,6 +38,8 @@ jobs:
       - ./gradlew wicket:wicked-charts-wicket15:artifactoryPublish -x test -Dsnapshot=true -Dbintray.user=$BINTRAY_USER -Dbintray.key=$BINTRAY_KEY -Dbuild.number=$TRAVIS_BUILD_NUMBER
       - ./gradlew wicket:wicked-charts-wicket6:artifactoryPublish -x test -Dsnapshot=true -Dbintray.user=$BINTRAY_USER -Dbintray.key=$BINTRAY_KEY -Dbuild.number=$TRAVIS_BUILD_NUMBER
       - ./gradlew wicket:wicked-charts-wicket7:artifactoryPublish -x test -Dsnapshot=true -Dbintray.user=$BINTRAY_USER -Dbintray.key=$BINTRAY_KEY -Dbuild.number=$TRAVIS_BUILD_NUMBER
+      - ./gradlew wicket:wicked-charts-wicket8:artifactoryPublish -x test -Dsnapshot=true -Dbintray.user=$BINTRAY_USER -Dbintray.key=$BINTRAY_KEY -Dbuild.number=$TRAVIS_BUILD_NUMBER
+
 
     # release a new stable version to bintray
     - stage: release
@@ -49,3 +51,4 @@ jobs:
       - ./gradlew wicket:wicked-charts-wicket15:bintrayUpload -x test -Dbintray.user=$BINTRAY_USER -Dbintray.key=$BINTRAY_KEY -Dbuild.number=$TRAVIS_BUILD_NUMBER
       - ./gradlew wicket:wicked-charts-wicket6:bintrayUpload -x test -Dbintray.user=$BINTRAY_USER -Dbintray.key=$BINTRAY_KEY -Dbuild.number=$TRAVIS_BUILD_NUMBER
       - ./gradlew wicket:wicked-charts-wicket7:bintrayUpload -x test -Dbintray.user=$BINTRAY_USER -Dbintray.key=$BINTRAY_KEY -Dbuild.number=$TRAVIS_BUILD_NUMBER
+      - ./gradlew wicket:wicked-charts-wicket8:bintrayUpload -x test -Dbintray.user=$BINTRAY_USER -Dbintray.key=$BINTRAY_KEY -Dbuild.number=$TRAVIS_BUILD_NUMBER
diff --git a/README.md b/README.md
index a439dc6a..29100dec 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ repositories {
 }
 
 dependencies {
-  compile 'de.adesso.wicked-charts:wicked-charts-wicket8:3.0.0'
+  compile 'de.adesso.wicked-charts:wicked-charts-wicket8:3.1.0'
 }
 ```
 
@@ -54,7 +54,7 @@ Maven:
 <dependency>
   <groupId>de.adesso.wicked-charts</groupId>
   <artifactId>wicked-charts-wicket8</artifactId>
-  <version>3.0.0</version>
+  <version>3.1.0</version>
   <type>pom</type>
 </dependency>
 
@@ -69,7 +69,7 @@ repositories {
 }
 
 dependencies {
-  compile 'de.adesso.wicked-charts:wicked-charts-wicket7:3.0.0'
+  compile 'de.adesso.wicked-charts:wicked-charts-wicket7:3.1.0'
 }
 ```
 
@@ -78,7 +78,7 @@ Maven:
 <dependency>
   <groupId>de.adesso.wicked-charts</groupId>
   <artifactId>wicked-charts-wicket7</artifactId>
-  <version>3.0.0</version>
+  <version>3.1.0</version>
   <type>pom</type>
 </dependency>
 ```
@@ -92,7 +92,7 @@ repositories {
 }
 
 dependencies {
-  compile 'de.adesso.wicked-charts:wicked-charts-wicket6:3.0.0'
+  compile 'de.adesso.wicked-charts:wicked-charts-wicket6:3.1.0'
 }
 ```
 
@@ -101,7 +101,7 @@ Maven:
 <dependency>
   <groupId>de.adesso.wicked-charts</groupId>
   <artifactId>wicked-charts-wicket6</artifactId>
-  <version>3.0.0</version>
+  <version>3.1.0</version>
   <type>pom</type>
 </dependency>
 ```
@@ -115,7 +115,7 @@ repositories {
 }
 
 dependencies {
-  compile 'de.adesso.wicked-charts:wicked-charts-wicket15:3.0.0'
+  compile 'de.adesso.wicked-charts:wicked-charts-wicket15:3.1.0'
 }
 ```
 
@@ -124,7 +124,7 @@ Maven:
 <dependency>
   <groupId>de.adesso.wicked-charts</groupId>
   <artifactId>wicked-charts-wicket15</artifactId>
-  <version>3.0.0</version>
+  <version>3.1.0</version>
   <type>pom</type>
 </dependency>
 ```
@@ -138,7 +138,7 @@ repositories {
 }
 
 dependencies {
-  compile 'de.adesso.wicked-charts:wicked-charts-wicket14:3.0.0'
+  compile 'de.adesso.wicked-charts:wicked-charts-wicket14:3.1.0'
 }
 ```
 
@@ -147,7 +147,7 @@ Maven:
 <dependency>
   <groupId>de.adesso.wicked-charts</groupId>
   <artifactId>wicked-charts-wicket14</artifactId>
-  <version>3.0.0</version>
+  <version>3.1.0</version>
   <type>pom</type>
 </dependency>
 ```
@@ -161,7 +161,7 @@ repositories {
 }
 
 dependencies {
-  compile 'de.adesso.wicked-charts:wicked-charts-jsf21:3.0.0'
+  compile 'de.adesso.wicked-charts:wicked-charts-jsf21:3.1.0'
 }
 ```
 
@@ -170,7 +170,7 @@ Maven:
 <dependency>
   <groupId>de.adesso.wicked-charts</groupId>
   <artifactId>wicked-charts-jsf21</artifactId>
-  <version>3.0.0</version>
+  <version>3.1.0</version>
   <type>pom</type>
 </dependency>
 ```
@@ -186,8 +186,8 @@ repositories {
 }
 
 dependencies {
-  compile 'de.adesso.wicked-charts:chartjs-wrapper:3.0.0'
-  compile 'de.adesso.wicked-charts:highcharts-wrapper:3.0.0'
+  compile 'de.adesso.wicked-charts:chartjs-wrapper:3.1.0'
+  compile 'de.adesso.wicked-charts:highcharts-wrapper:3.1.0'
 }
 ```
 
@@ -197,14 +197,14 @@ Maven:
     <dependency>
       <groupId>de.adesso.wicked-charts</groupId>
       <artifactId>chartjs-wrapper</artifactId>
-      <version>3.0.0</version>
+      <version>3.1.0</version>
       <type>pom</type>
     </dependency>
     
     <dependency>
       <groupId>de.adesso.wicked-charts</groupId>
       <artifactId>highcharts-wrapper</artifactId>
-      <version>3.0.0</version>
+      <version>3.1.0</version>
       <type>pom</type>
     </dependency>
 </dependencies>
diff --git a/build.gradle b/build.gradle
index eebde4ca..76394e70 100644
--- a/build.gradle
+++ b/build.gradle
@@ -73,29 +73,6 @@ subprojects {
         }
     }
 
-    publishing {
-        publications {
-            mavenPublication(MavenPublication) {
-                from components.java
-                artifact sourcesJar {
-                    classifier "sources"
-                }
-                artifact javadocJar {
-                    classifier "javadoc"
-                }
-                groupId 'de.adesso.wicked-charts'
-                artifactId project.name
-                version project.version
-                pom.withXml {
-                    def root = asNode()
-                    root.appendNode('description', 'Beautiful Charts for Java-based Web Applications')
-                    root.appendNode('name', project.name)
-                    root.appendNode('url', 'https://github.com/adessoag/wicked-charts')
-                    root.children().last() + pomConfig
-                }
-            }
-        }
-    }
 
     artifactory {
         contextUrl = 'http://oss.jfrog.org'
@@ -142,4 +119,28 @@ subprojects {
 
         publish = true
     }
+
+    publishing {
+        publications {
+            mavenPublication(MavenPublication) {
+                from components.java
+                artifact sourcesJar {
+                    classifier "sources"
+                }
+                artifact javadocJar {
+                    classifier "javadoc"
+                }
+                groupId 'de.adesso.wicked-charts'
+                artifactId project.name
+                version project.version
+                pom.withXml {
+                    def root = asNode()
+                    root.appendNode('description', 'Beautiful Charts for Java-based Web Applications')
+                    root.appendNode('name', project.name)
+                    root.appendNode('url', 'https://github.com/adessoag/wicked-charts')
+                    root.children().last() + pomConfig
+                }
+            }
+        }
+    }
 }
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 9ec837b2..8941bfbb 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.8-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-all.zip
diff --git a/showcase/build.gradle b/showcase/build.gradle
index 38c5388d..6c57891c 100644
--- a/showcase/build.gradle
+++ b/showcase/build.gradle
@@ -35,7 +35,7 @@ dependencies {
 }
 
 // run gradle with "-Dsnapshot=true" to automatically append "-SNAPSHOT" to the version
-version = '3.0.0' + (Boolean.valueOf(System.getProperty("snapshot")) ? "-SNAPSHOT" : "")
+version = '3.1.0' + (Boolean.valueOf(System.getProperty("snapshot")) ? "-SNAPSHOT" : "")
 sourceCompatibility = 1.8
 
 ext {
@@ -98,7 +98,7 @@ publishing {
             }
             groupId 'de.adesso.wicked-charts'
             artifactId 'wicked-charts-showcase-options'
-            version '3.0.0'
+            version '3.1.0'
             pom.withXml {
                 def root = asNode()
                 root.appendNode('description', 'Beautiful Charts for Java-based Web Applications')
diff --git a/showcase/gradle/wrapper/gradle-wrapper.properties b/showcase/gradle/wrapper/gradle-wrapper.properties
index 238101c8..a18a9e65 100644
--- a/showcase/gradle/wrapper/gradle-wrapper.properties
+++ b/showcase/gradle/wrapper/gradle-wrapper.properties
@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.8-all.zip
\ No newline at end of file
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.5.1-all.zip
\ No newline at end of file
diff --git a/showcase/wicked-charts-showcase-jsf21/build.gradle b/showcase/wicked-charts-showcase-jsf21/build.gradle
index c0d23a5c..5ab3368f 100644
--- a/showcase/wicked-charts-showcase-jsf21/build.gradle
+++ b/showcase/wicked-charts-showcase-jsf21/build.gradle
@@ -1,5 +1,5 @@
 dependencies {
-	compile 'de.adesso.wicked-charts:wicked-charts-jsf21:3.0.0'
+	compile group: 'de.adesso.wicked-charts', name: 'wicked-charts-wicket6', version: "${wicketcharts_version}"
 	compile project(':wicked-charts-showcase-options')
 	compile 'org.slf4j:slf4j-log4j12:1.6.2'
 	compile 'log4j:log4j:1.2.17'
diff --git a/showcase/wicked-charts-showcase-options/build.gradle b/showcase/wicked-charts-showcase-options/build.gradle
index 23d9cc1c..45351ca2 100644
--- a/showcase/wicked-charts-showcase-options/build.gradle
+++ b/showcase/wicked-charts-showcase-options/build.gradle
@@ -1,5 +1,5 @@
 dependencies {
-	compile 'de.adesso.wicked-charts:highcharts-wrapper:3.0.0'
+	compile group: 'de.adesso.wicked-charts', name: 'highcharts-wrapper', version: "${wicketcharts_version}"
 	testCompile 'junit:junit:4.12'
 	compile 'junit:junit:4.12'
 }
\ No newline at end of file