diff --git a/.travis.yml b/.travis.yml
index fdd32723..1d76105d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,8 +4,8 @@ android:
     - tools
     - platform-tools
     - tools
-    - build-tools-27.0.3
-    - android-27
+    - build-tools-28.0.3
+    - android-28
   licenses:
     - 'android-sdk-preview-license-.+'
     - 'android-sdk-license-.+'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b5dabff..85d12955 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,15 @@
+# Release v19.3.1
+
+* MISC: Update dependency versions
+* FIX: Netty: call onDisconnect when crossbar not reachable (#418)
+* MISC: Remove legacy files (#416)
+* FIX: dont send null CloseDetails on transport lost in netty implementation (#414)
+* FIX: Fix typo in readStateListener adder (#413)
+* NEW: Build (and publish) Android aar as part of the CI (#409)
+* NEW: add preliminary WAMP-over-RawSocket implementation (#406)
+
+---
+
 # Release v18.5.2
 
 * FIX: Don't call onLeave listener twice in case of normal GoodBye (#405)
diff --git a/Makefile b/Makefile
index 418efcf3..bfcac1aa 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 BUILD_DATE=$(shell date -u +"%Y-%m-%d")
-AUTOBAHN_JAVA_VERSION='18.5.2'
+AUTOBAHN_JAVA_VERSION='19.3.1'
 AUTOBAHN_JAVA_VCS_REF='unknown'
 
 default:
diff --git a/autobahn/build.gradle b/autobahn/build.gradle
index b01ea51f..172444aa 100644
--- a/autobahn/build.gradle
+++ b/autobahn/build.gradle
@@ -15,17 +15,17 @@ def relVersion = System.getenv().containsKey('AUTOBAHN_BUILD_VERSION') ? System.
 def siteUrl = 'https://github.com/crossbario/autobahn-java'
 
 dependencies {
-    api 'com.fasterxml.jackson.core:jackson-core:2.9.5'
+    api 'com.fasterxml.jackson.core:jackson-core:2.9.8'
     //api 'net.sourceforge.streamsupport:streamsupport-cfuture:1.6.2'
-    implementation 'com.fasterxml.jackson.core:jackson-databind:2.9.5'
-    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.9.5'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.9.8'
+    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.9.8'
     implementation 'org.msgpack:jackson-dataformat-msgpack:0.8.16'
     if (project.IS_ANDROID) {
-        implementation 'com.github.joshjdevl.libsodiumjni:libsodium-jni-aar:1.0.8'
+        implementation 'com.github.joshjdevl.libsodiumjni:libsodium-jni-aar:2.0.1'
     } else {
-        implementation 'com.github.joshjdevl.libsodiumjni:libsodium-jni:1.0.8'
-        implementation 'io.netty:netty-codec-http:4.1.24.Final'
-        implementation 'io.netty:netty-handler:4.1.24.Final'
+        implementation 'com.github.joshjdevl.libsodiumjni:libsodium-jni:2.0.1'
+        implementation 'io.netty:netty-codec-http:4.1.34.Final'
+        implementation 'io.netty:netty-handler:4.1.34.Final'
     }
 }
 
@@ -63,11 +63,11 @@ bintray {
 
 if (project.IS_ANDROID) {
     android {
-        compileSdkVersion 27
-        buildToolsVersion '27.0.3'
+        compileSdkVersion 28
+        buildToolsVersion '28.0.3'
         defaultConfig {
             minSdkVersion 24
-            targetSdkVersion 27
+            targetSdkVersion 28
         }
         buildTypes {
             release {
@@ -97,9 +97,15 @@ if (project.IS_ANDROID) {
     }
 
     task javadoc(type: Javadoc) {
+        failOnError false
         source = android.sourceSets.main.java.srcDirs
         classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
     }
+    afterEvaluate {
+        javadoc.classpath += files(android.libraryVariants.collect { variant ->
+            variant.javaCompile.classpath.files
+        })
+    }
     project.archivesBaseName = project.BUILD_LEGACY ? ARTIFACT_ANDROID_LEGACY: ARTIFACT_ANDROID
     group = groupID
     version = relVersion
@@ -138,6 +144,10 @@ if (project.IS_ANDROID) {
             }
         }
     }
+    task javadocJar(type: Jar, dependsOn: javadoc) {
+        classifier = 'javadoc'
+        from javadoc.destinationDir
+    }
 } else {
     // Create the pom configuration:
     def pomConfig = {
@@ -159,6 +169,14 @@ if (project.IS_ANDROID) {
             url siteUrl
         }
     }
+    task sourcesJar(type: Jar, dependsOn: classes) {
+        classifier = 'sources'
+        from sourceSets.main.allSource
+    }
+    task javadocJar(type: Jar, dependsOn: javadoc) {
+        classifier = 'javadoc'
+        from javadoc.destinationDir
+    }
     publishing {
         publications {
             mavenJava(MavenPublication) {
@@ -179,10 +197,6 @@ if (project.IS_ANDROID) {
             }
         }
     }
-    task sourcesJar(type: Jar, dependsOn: classes) {
-        classifier = 'sources'
-        from sourceSets.main.allSource
-    }
     sourceSets {
         main {
             java {
@@ -199,11 +213,6 @@ if (project.IS_ANDROID) {
     targetCompatibility = JavaVersion.VERSION_1_8
 }
 
-task javadocJar(type: Jar, dependsOn: javadoc) {
-    classifier = 'javadoc'
-    from javadoc.destinationDir
-}
-
 artifacts {
     archives sourcesJar
     archives javadocJar
diff --git a/build.gradle b/build.gradle
index 2357f4f5..8d21a03b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -17,13 +17,13 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.0'
+        classpath 'com.jfrog.bintray.gradle:gradle-bintray-plugin:1.8.4'
     }
     // Android specific dependencies.
     if (project.properties.get('buildPlatform', 'android') == 'android') {
         dependencies {
-            classpath 'com.android.tools.build:gradle:3.1.3'
-            classpath 'com.github.dcendents:android-maven-gradle-plugin:2.0'
+            classpath 'com.android.tools.build:gradle:3.3.2'
+            classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
         }
     }
 }
diff --git a/demo-gallery/build.gradle b/demo-gallery/build.gradle
index 619aa1ef..adf0de3d 100644
--- a/demo-gallery/build.gradle
+++ b/demo-gallery/build.gradle
@@ -2,12 +2,12 @@ apply plugin: project.PLATFORM == project.PLATFORM_NETTY ? project.PLUGIN_JAVA_A
 
 if (plugins.hasPlugin(project.PLUGIN_ANDROID_APP)) {
     android {
-        compileSdkVersion 27
-        buildToolsVersion '27.0.3'
+        compileSdkVersion 28
+        buildToolsVersion '28.0.3'
 
         defaultConfig {
             minSdkVersion 24
-            targetSdkVersion 27
+            targetSdkVersion 28
         }
         buildTypes {
             release {
@@ -32,7 +32,7 @@ if (plugins.hasPlugin(project.PLUGIN_ANDROID_APP)) {
 
     dependencies {
         implementation project(path: ':autobahn')
-        implementation 'com.android.support:appcompat-v7:27.1.1'
+        implementation 'com.android.support:appcompat-v7:28.0.0'
     }
 } else {
     mainClassName = 'io.crossbar.autobahn.demogallery.netty.Main'
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index db6de655..018f891f 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/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-4.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.1-all.zip