diff --git a/autobahn/build.gradle b/autobahn/build.gradle
index 28c69ffb..0884ac69 100644
--- a/autobahn/build.gradle
+++ b/autobahn/build.gradle
@@ -36,6 +36,9 @@ if (plugins.hasPlugin(project.PLUGIN_ANDROID_LIB)) {
             baseName = 'autobahn'
         }
     }
+    jar {
+        version = project.properties.get("buildVersion", "")
+    }
     sourceCompatibility = JavaVersion.VERSION_1_8
     targetCompatibility = JavaVersion.VERSION_1_8
 }
diff --git a/demo-gallery/build.gradle b/demo-gallery/build.gradle
index 32a560b3..daa4ff66 100644
--- a/demo-gallery/build.gradle
+++ b/demo-gallery/build.gradle
@@ -53,4 +53,7 @@ if (plugins.hasPlugin(project.PLUGIN_ANDROID_APP)) {
             }
         }
     }
+    jar {
+        version = project.properties.get("buildVersion", "")
+    }
 }
diff --git a/docker/Dockerfile.netty b/docker/Dockerfile.netty
index a50813ba..28a5d702 100644
--- a/docker/Dockerfile.netty
+++ b/docker/Dockerfile.netty
@@ -39,8 +39,9 @@ ENV PATH=$PATH:/opt/gradle/gradle-${GRADLE_VERSION}/bin
 
 COPY ${PWD} /workspace
 
-RUN gradle installDist -PbuildPlatform=netty
+RUN gradle installDist -PbuildPlatform=netty -PbuildVersion=${AUTOBAHN_JAVA_VERSION}
 
-RUN mkdir -p /autobahn; cp /workspace/demo-gallery/build/install/demo-gallery/lib/* /autobahn
+RUN mkdir -p /autobahn; cp /workspace/demo-gallery/build/install/demo-gallery/lib/* /autobahn; \
+    rm /autobahn/demo-gallery*.jar
 
 CMD ["gradle", "installDist", "-PbuildPlatform=netty"]