diff --git a/PeerAtCodeFramework.jar b/PeerAtCodeFramework.jar
index 13a01ae..e10f0c9 100644
Binary files a/PeerAtCodeFramework.jar and b/PeerAtCodeFramework.jar differ
diff --git a/src/dev/peerat/backend/Main.java b/src/dev/peerat/backend/Main.java
index 757dfca..2ebb89f 100644
--- a/src/dev/peerat/backend/Main.java
+++ b/src/dev/peerat/backend/Main.java
@@ -127,7 +127,6 @@ public class Main{
 				locker.init(key);
 				try {
 					while(true){
-						locker.lock(key);
 						Context instance = locker.getValue(key);
 						if(instance == null) continue;
 						System.out.println("["+((instance.isLogged()) ? repo.getPlayerRepository().getPlayer(instance.<PeerAtUser>getUser().getId()).getPseudo() : "?")+"] "+instance.getType()+" "+instance.getPath()+" -> "+instance.getResponseCode());
@@ -141,20 +140,7 @@ public class Main{
 		
 		new Thread(new Runnable(){
 			public void run(){
-				Key key = new Key();
-				
-				Locker<Throwable> locker = router.getExceptionLogger();
-				
-				locker.init(key);
-				try {
-					while(true){
-						locker.lock(key);
-						locker.getValue(key).printStackTrace();
-					}
-				}catch(Exception e){
-					e.printStackTrace();
-				}
-				locker.remove(key);
+				router.getExceptionLogger().listen((throwable) -> throwable.printStackTrace(), (exception) -> exception.printStackTrace());
 			}
 		}).start();
 		
diff --git a/src/dev/peerat/backend/bonus/discord/Bot.java b/src/dev/peerat/backend/bonus/discord/Bot.java
index 705e8be..297f800 100644
--- a/src/dev/peerat/backend/bonus/discord/Bot.java
+++ b/src/dev/peerat/backend/bonus/discord/Bot.java
@@ -55,7 +55,6 @@ public class Bot extends Thread{
 			}
 			
 			while(true){
-				locker.lock(key);
 				Group group = locker.getValue(key);
 				Integer chapter = group.getLinkToChapter();
 //				Integer puzzle = group.getLinkToPuzzle();
diff --git a/src/dev/peerat/backend/routes/DynamicLeaderboard.java b/src/dev/peerat/backend/routes/DynamicLeaderboard.java
index 5748e01..2698600 100644
--- a/src/dev/peerat/backend/routes/DynamicLeaderboard.java
+++ b/src/dev/peerat/backend/routes/DynamicLeaderboard.java
@@ -41,7 +41,6 @@ public class DynamicLeaderboard extends Leaderboard{
 				}else{
 					playersLeaderboard(writer);
 				}
-				locker.lock(key);
 			}
 		}catch(Exception e){
 			e.printStackTrace();
diff --git a/src/dev/peerat/backend/routes/EventSSE.java b/src/dev/peerat/backend/routes/EventSSE.java
index e0aba04..62ddc44 100644
--- a/src/dev/peerat/backend/routes/EventSSE.java
+++ b/src/dev/peerat/backend/routes/EventSSE.java
@@ -28,7 +28,6 @@ public class EventSSE{
 		locker.init(key);
 		try {
 			while(true){
-				locker.lock(key);
 				GroupMessage message = locker.getValue(key);
 				if(message.getGroup() == null || message.getGroup().equals(group)){
 					JsonMap send = new JsonMap();
diff --git a/src/dev/peerat/backend/routes/PuzzleResponse.java b/src/dev/peerat/backend/routes/PuzzleResponse.java
index c415f5e..4baaadd 100644
--- a/src/dev/peerat/backend/routes/PuzzleResponse.java
+++ b/src/dev/peerat/backend/routes/PuzzleResponse.java
@@ -115,7 +115,7 @@ public class PuzzleResponse implements Response {
 		writer.write(responseJSON.toString());
 		writer.flush();
 		
-		leaderboard.setValue(completion);
+		leaderboard.pushValue(completion);
 	}
 
 	private void saveSourceCode(ReceivedResponse received, Player player){
diff --git a/src/dev/peerat/backend/routes/admins/GroupController.java b/src/dev/peerat/backend/routes/admins/GroupController.java
index 6cecf10..cade6b8 100644
--- a/src/dev/peerat/backend/routes/admins/GroupController.java
+++ b/src/dev/peerat/backend/routes/admins/GroupController.java
@@ -25,7 +25,7 @@ public class GroupController {
 			return;
 		}
 		
-		locker.setValue(new GroupMessage(json.get("group"), json.get("message")));
+		locker.pushValue(new GroupMessage(json.get("group"), json.get("message")));
 		context.response(200);
 	}
 
diff --git a/src/dev/peerat/backend/routes/admins/LogController.java b/src/dev/peerat/backend/routes/admins/LogController.java
index b9f19cf..c7259f6 100644
--- a/src/dev/peerat/backend/routes/admins/LogController.java
+++ b/src/dev/peerat/backend/routes/admins/LogController.java
@@ -63,7 +63,6 @@ public class LogController {
 		locker.init(key);
 		try {
 			while(!reader.isClosed()){
-				locker.lock(key);
 				T instance  = locker.getValue(key);
 				JsonMap json = new JsonMap();
 				consumer.accept(json, instance);
diff --git a/src/dev/peerat/backend/routes/admins/WebHookLeaderboard.java b/src/dev/peerat/backend/routes/admins/WebHookLeaderboard.java
index 9a3b560..ed1ed2b 100644
--- a/src/dev/peerat/backend/routes/admins/WebHookLeaderboard.java
+++ b/src/dev/peerat/backend/routes/admins/WebHookLeaderboard.java
@@ -21,7 +21,7 @@ public class WebHookLeaderboard implements Response{
 	
 	@Route(path = "^/admin/webhook/leaderboard/$", needLogin = true)
 	public void exec(Matcher matcher, Context context, HttpReader reader, HttpWriter writer) throws Exception{
-		locker.setValue(new Completion(0, 0));
+		locker.pushValue(new Completion(0, 0));
 		context.response(200);
 	}
 
diff --git a/src/dev/peerat/backend/routes/groups/GroupCreate.java b/src/dev/peerat/backend/routes/groups/GroupCreate.java
index bf6acc0..a4b0877 100644
--- a/src/dev/peerat/backend/routes/groups/GroupCreate.java
+++ b/src/dev/peerat/backend/routes/groups/GroupCreate.java
@@ -71,7 +71,7 @@ public class GroupCreate extends FormResponse {
 				if (this.repo.insertGroup(newGroup, user)) {
 					context.response(200);
 					
-					locker.setValue(newGroup);
+					locker.pushValue(newGroup);
 				} else {
 					context.response(403);
 				}
diff --git a/src/dev/peerat/backend/routes/groups/GroupJoin.java b/src/dev/peerat/backend/routes/groups/GroupJoin.java
index f1c6940..f39d75e 100644
--- a/src/dev/peerat/backend/routes/groups/GroupJoin.java
+++ b/src/dev/peerat/backend/routes/groups/GroupJoin.java
@@ -75,7 +75,7 @@ public class GroupJoin implements Response{
 		if (this.groupRepo.insertUserInGroup(group, user)) {
 			context.response(200);
 			
-			leaderboard.setValue(new Completion(0, 0, 0, null, 0));
+			leaderboard.pushValue(new Completion(0, 0, 0, null, 0));
 		} else {
 			context.response(403);
 		}
diff --git a/src/dev/peerat/backend/routes/groups/GroupQuit.java b/src/dev/peerat/backend/routes/groups/GroupQuit.java
index 7bf6f19..8ddc9fd 100644
--- a/src/dev/peerat/backend/routes/groups/GroupQuit.java
+++ b/src/dev/peerat/backend/routes/groups/GroupQuit.java
@@ -67,7 +67,7 @@ public class GroupQuit implements Response{
 		if (this.groupRepo.leaveGroup(group, user)) {
 			context.response(200);
 			
-			leaderboard.setValue(new Completion(0, 0, 0, null, 0));
+			leaderboard.pushValue(new Completion(0, 0, 0, null, 0));
 		} else {
 			context.response(403);
 		}