diff --git a/runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java b/runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java
index a9eec5da37..3643bb392a 100644
--- a/runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java
+++ b/runelite-client/src/main/java/net/runelite/client/config/ConfigManager.java
@@ -864,7 +864,7 @@ public class ConfigManager
 
 		try
 		{
-			ConfigChanged configChanged = Util.objectFromByteBuffer(message.getBuffer());
+			ConfigChanged configChanged = Util.objectFromByteBuffer(message.getObject());
 
 			if (!configChanged.getPath().equals(settingsFileInput.getAbsolutePath()))
 			{
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/PluginManager.java b/runelite-client/src/main/java/net/runelite/client/plugins/PluginManager.java
index e9cdf90415..3386965652 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/PluginManager.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/PluginManager.java
@@ -80,6 +80,7 @@ import net.runelite.client.task.Scheduler;
 import net.runelite.client.ui.RuneLiteSplashScreen;
 import net.runelite.client.util.GameEventManager;
 import net.runelite.client.util.Groups;
+import net.runelite.client.util.SwingUtil;
 import org.jgroups.Message;
 import org.pf4j.Extension;
 
@@ -291,6 +292,7 @@ public class PluginManager
 			log.warn("Unable to reset plugin configuration", ex);
 		}
 	}
+
 	public void loadCorePlugins() throws IOException
 	{
 		plugins.addAll(scanAndInstantiate(getClass().getClassLoader(), PLUGIN_PACKAGE, false));
@@ -416,44 +418,44 @@ public class PluginManager
 
 		final long start = System.currentTimeMillis();
 
-			List<Plugin> scannedPlugins = new CopyOnWriteArrayList<>();
-			sortedPlugins.forEach(group ->
-			{
-				List<Future<?>> curGroup = new ArrayList<>();
-				group.forEach(pluginClazz ->
-					curGroup.add(executorService.submit(() ->
-					{
-						Plugin plugin;
-						try
-						{
-							plugin = instantiate(scannedPlugins, (Class<Plugin>) pluginClazz);
-							scannedPlugins.add(plugin);
-						}
-						catch (PluginInstantiationException e)
-						{
-							log.warn("Error instantiating plugin!", e);
-							return;
-						}
-
-						loaded.getAndIncrement();
-
-						RuneLiteSplashScreen.stage(.60, .65, "Loading internal plugins", loaded.get(), scannedPlugins.size());
-					})));
-				curGroup.forEach(future ->
+		List<Plugin> scannedPlugins = new CopyOnWriteArrayList<>();
+		sortedPlugins.forEach(group ->
+		{
+			List<Future<?>> curGroup = new ArrayList<>();
+			group.forEach(pluginClazz ->
+				curGroup.add(executorService.submit(() ->
 				{
+					Plugin plugin;
 					try
 					{
-						future.get();
+						plugin = instantiate(scannedPlugins, (Class<Plugin>) pluginClazz);
+						scannedPlugins.add(plugin);
 					}
-					catch (InterruptedException | ExecutionException e)
+					catch (PluginInstantiationException e)
 					{
-						e.printStackTrace();
+						log.warn("Error instantiating plugin!", e);
+						return;
 					}
-				});
-			});
 
-			log.info("Plugin instantiation took {}ms", System.currentTimeMillis() - start);
-			return scannedPlugins;
+					loaded.getAndIncrement();
+
+					RuneLiteSplashScreen.stage(.60, .65, "Loading internal plugins", loaded.get(), scannedPlugins.size());
+				})));
+			curGroup.forEach(future ->
+			{
+				try
+				{
+					future.get();
+				}
+				catch (InterruptedException | ExecutionException e)
+				{
+					e.printStackTrace();
+				}
+			});
+		});
+
+		log.info("Plugin instantiation took {}ms", System.currentTimeMillis() - start);
+		return scannedPlugins;
 	}
 
 	public boolean startPlugin(Plugin plugin) throws PluginInstantiationException
@@ -764,29 +766,47 @@ public class PluginManager
 		switch (command)
 		{
 			case "STARTPLUGIN":
-
 				try
 				{
-					startPlugin(finalPlugin);
+					SwingUtil.syncExec(() ->
+					{
+						try
+						{
+							startPlugin(finalPlugin);
+						}
+						catch (PluginInstantiationException e)
+						{
+							log.warn("unable to start plugin", e);
+							throw new RuntimeException(e);
+						}
+					});
 				}
-				catch (PluginInstantiationException e)
+				catch (InvocationTargetException | InterruptedException e)
 				{
-					log.warn("unable to start plugin", e);
-					throw new RuntimeException(e);
+					log.error("eh?");
 				}
 
 				break;
 
 			case "STOPPLUGIN":
-
 				try
 				{
-					stopPlugin(finalPlugin);
+					SwingUtil.syncExec(() ->
+					{
+						try
+						{
+							stopPlugin(finalPlugin);
+						}
+						catch (PluginInstantiationException e)
+						{
+							log.warn("unable to stop plugin", e);
+							throw new RuntimeException(e);
+						}
+					});
 				}
-				catch (PluginInstantiationException e)
+				catch (InvocationTargetException | InterruptedException e)
 				{
-					log.warn("unable to stop plugin", e);
-					throw new RuntimeException(e);
+					log.error("eh?");
 				}
 
 				break;
diff --git a/runelite-client/src/main/java/net/runelite/client/util/Groups.java b/runelite-client/src/main/java/net/runelite/client/util/Groups.java
index c820a276ef..d6e603f79f 100644
--- a/runelite-client/src/main/java/net/runelite/client/util/Groups.java
+++ b/runelite-client/src/main/java/net/runelite/client/util/Groups.java
@@ -22,13 +22,14 @@ import net.runelite.client.ui.RuneLiteSplashScreen;
 import org.jgroups.Address;
 import org.jgroups.JChannel;
 import org.jgroups.Message;
-import org.jgroups.ReceiverAdapter;
+import org.jgroups.ObjectMessage;
+import org.jgroups.Receiver;
 import org.jgroups.View;
 import org.jgroups.util.Util;
 
 @Slf4j
 @Singleton
-public class Groups extends ReceiverAdapter
+public class Groups implements Receiver
 {
 	private final OpenOSRSConfig openOSRSConfig;
 	private final JChannel channel;
@@ -38,7 +39,7 @@ public class Groups extends ReceiverAdapter
 	@Getter(AccessLevel.PUBLIC)
 	private List<Address> members;
 	@Getter(AccessLevel.PUBLIC)
-	private Map<String, List<Address>> messageMap = new HashMap<>();
+	private final Map<String, List<Address>> messageMap = new HashMap<>();
 	@Getter(AccessLevel.PUBLIC)
 	private final PublishSubject<Message> messageStringSubject = PublishSubject.create();
 	@Getter(AccessLevel.PUBLIC)
@@ -79,9 +80,9 @@ public class Groups extends ReceiverAdapter
 		try
 		{
 			byte[] buffer = Util.objectToByteBuffer(configChanged);
-			Message message = new Message()
+			Message message = new ObjectMessage()
 				.setDest(destination)
-				.setBuffer(buffer);
+				.setObject(buffer);
 
 			channel.send(message);
 		}
@@ -119,7 +120,7 @@ public class Groups extends ReceiverAdapter
 
 		try
 		{
-			channel.send(new Message(destination, command));
+			channel.send(new ObjectMessage(destination, command));
 		}
 		catch (Exception e)
 		{
diff --git a/runelite-client/src/main/resources/udp-openosrs.xml b/runelite-client/src/main/resources/udp-openosrs.xml
index 2dad4551c8..5010d78591 100644
--- a/runelite-client/src/main/resources/udp-openosrs.xml
+++ b/runelite-client/src/main/resources/udp-openosrs.xml
@@ -7,7 +7,7 @@
 <config xmlns="urn:org:jgroups"
 		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 		xsi:schemaLocation="urn:org:jgroups http://www.jgroups.org/schema/jgroups.xsd"
-        version="4.2.4.Final">
+        version="5.0.0">
 	<UDP
 			bind_addr="127.0.0.1"
 			mcast_port="${jgroups.udp.mcast_port:45588}"