diff --git a/ivy.xml b/ivy.xml
index 745fac2..9332ef0 100755
--- a/ivy.xml
+++ b/ivy.xml
@@ -6,9 +6,9 @@
         module="opinionated-vertx">
 	</info>
 	<dependencies>
-		<dependency org="io.vertx" name="vertx-config" rev="4.2.2" conf="*->compile;*->default"/>
-		<dependency org="io.vertx" name="vertx-web" rev="4.2.2" conf="*->compile;*->default"/>
-		<dependency org="io.vertx" name="vertx-web-client" rev="4.2.2" conf="*->compile;*->default"/>
-		<dependency org="com.fasterxml.jackson.core" name="jackson-databind" rev="2.12.6" conf="*->compile;*->default"/>
+		<dependency org="io.vertx" name="vertx-config" rev="4.5.1" conf="*->compile;*->default"/>
+		<dependency org="io.vertx" name="vertx-web" rev="4.5.1" conf="*->compile;*->default"/>
+		<dependency org="io.vertx" name="vertx-web-client" rev="4.5.1" conf="*->compile;*->default"/>
+		<dependency org="com.fasterxml.jackson.core" name="jackson-databind" rev="2.15.3" conf="*->compile;*->default"/>
 	</dependencies>
 </ivy-module>
diff --git a/src/de/pzzz/vertx/PersistentRestDataAccess.java b/src/de/pzzz/vertx/PersistentRestDataAccess.java
index 02b8b11..5a9b3e4 100755
--- a/src/de/pzzz/vertx/PersistentRestDataAccess.java
+++ b/src/de/pzzz/vertx/PersistentRestDataAccess.java
@@ -89,10 +89,10 @@ public class PersistentRestDataAccess<T extends SerializableWithId> extends Rest
 
     private CompositeFuture readAllFiles(final List<String> filePaths) {
         LOG.info("Found " + filePaths.size() + " files in directory " + baseDir);
-        return CompositeFuture.join(filePaths.stream().map(this::readFileContent).toList());
+        return Future.join(filePaths.stream().map(this::readFileContent).toList());
     }
 
-    private Future readFileContent(final String filePath) {
+    private Future<Void> readFileContent(final String filePath) {
         Promise<Void> readFuture = Promise.promise();
         vertx.fileSystem().readFile(filePath)
             .onComplete(ar -> {
diff --git a/src/de/pzzz/vertx/RestDataAccess.java b/src/de/pzzz/vertx/RestDataAccess.java
index 092a2b3..fbc8cf0 100755
--- a/src/de/pzzz/vertx/RestDataAccess.java
+++ b/src/de/pzzz/vertx/RestDataAccess.java
@@ -68,7 +68,7 @@ public class RestDataAccess<T extends SerializableWithId> {
     }
 
     protected void update(final String id, final RoutingContext context) {
-        T newData = Json.decodeValue(context.getBody(), classReference);
+        T newData = context.body().asPojo(classReference);
         if (!newData.getId().equals(id)) {
             context.fail(400);
         }
@@ -76,7 +76,7 @@ public class RestDataAccess<T extends SerializableWithId> {
     }
 
     protected T getDataFromRequest(final RoutingContext context) {
-    	return Json.decodeValue(context.getBody(), classReference);
+        return context.body().asPojo(classReference);
     }
 
     private void handleMessage(final Message<RestDataRequest<T>> request) {
diff --git a/src/de/pzzz/vertx/oauth/OAuthWebClient.java b/src/de/pzzz/vertx/oauth/OAuthWebClient.java
index da40f71..f25cf15 100755
--- a/src/de/pzzz/vertx/oauth/OAuthWebClient.java
+++ b/src/de/pzzz/vertx/oauth/OAuthWebClient.java
@@ -44,7 +44,7 @@ public class OAuthWebClient {
 
     public Future<HttpRequest<Buffer>> prepareAuthenticatedRequest(final HttpMethod method, final String requestPath) {
 		Promise<HttpRequest<Buffer>> promise = Promise.promise();
-		ensureIsAuthenticated().onComplete(v -> 
+		ensureIsAuthenticated().andThen(v -> 
 			promise.complete(webClient.requestAbs(method, config.getBaseUrl() + requestPath)
 					.bearerTokenAuthentication(token.getToken()))
 		).onFailure(promise::fail);
diff --git a/src/de/pzzz/vertx/process/ProcessExecutionController.java b/src/de/pzzz/vertx/process/ProcessExecutionController.java
index d1cdfe1..3655170 100755
--- a/src/de/pzzz/vertx/process/ProcessExecutionController.java
+++ b/src/de/pzzz/vertx/process/ProcessExecutionController.java
@@ -9,7 +9,6 @@ import de.pzzz.vertx.Startup;
 import de.pzzz.vertx.worker.DeployableWorker;
 import de.pzzz.vertx.worker.QueuedWorker;
 import io.vertx.core.Closeable;
-import io.vertx.core.CompositeFuture;
 import io.vertx.core.Future;
 import io.vertx.core.Promise;
 
@@ -28,7 +27,7 @@ public abstract class ProcessExecutionController<T extends ExecutableProcess<V,U
 
     public Future<Void> deployWorkers() {
         Promise<Void> promise = Promise.promise();
-        CompositeFuture.all(getWorker().stream().map(controller -> (Future) controller.deployWorkers(startup)).toList())
+        Future.all(getWorker().stream().map(controller -> controller.deployWorkers(startup)).toList())
                 .onSuccess(res -> promise.complete())
                 .onFailure(error -> {
                     LOG.log(Level.SEVERE, error.getMessage(), error);
@@ -39,7 +38,7 @@ public abstract class ProcessExecutionController<T extends ExecutableProcess<V,U
 
     @Override
     public void close(final Promise<Void> completion) {
-    	CompositeFuture.all(getWorker().stream().map(worker -> (Future) worker.undeployWorkers()).toList())
+        Future.all(getWorker().stream().map(DeployableWorker::undeployWorkers).toList())
                 .onSuccess(res -> completion.complete())
                 .onFailure(error -> {
                     LOG.log(Level.SEVERE, error.getMessage(), error);
diff --git a/src/de/pzzz/vertx/worker/WorkerController.java b/src/de/pzzz/vertx/worker/WorkerController.java
index b6492af..3f9d989 100755
--- a/src/de/pzzz/vertx/worker/WorkerController.java
+++ b/src/de/pzzz/vertx/worker/WorkerController.java
@@ -8,6 +8,7 @@ import de.pzzz.vertx.Startup;
 import io.vertx.core.DeploymentOptions;
 import io.vertx.core.Future;
 import io.vertx.core.Promise;
+import io.vertx.core.ThreadingModel;
 import io.vertx.core.Vertx;
 import io.vertx.core.eventbus.DeliveryOptions;
 import io.vertx.core.json.JsonObject;
@@ -39,7 +40,7 @@ public abstract class WorkerController<T, U> implements DeployableWorker {
 		config.put(WORKER_BUS_ADDRESS_CONFIG, busAddress());
 		LOG.info("Deploy " + maxWorkers + " workers for bus " + busAddress());
 		DeploymentOptions workerOpts = new DeploymentOptions()
-				.setWorker(true)
+				.setThreadingModel(ThreadingModel.WORKER)
 				.setConfig(startup.getConfig())
 				.setWorkerPoolName(busAddress())
 				.setInstances(maxWorkers)