diff --git a/back/src/chat/chat.controller.ts b/back/src/chat/chat.controller.ts
index e6fcb13..dbbe2ab 100644
--- a/back/src/chat/chat.controller.ts
+++ b/back/src/chat/chat.controller.ts
@@ -18,10 +18,9 @@ import { CreateChannelDto } from './dto/create-channel.dto'
 import { IdDto, PasswordDto, MuteDto } from './dto/updateUser.dto'
 
 import type User from 'src/users/entity/user.entity'
-import Channel from './entity/channel.entity'
+import type Channel from './entity/channel.entity'
 import { Profile42 } from 'src/auth/42.decorator'
 import { Profile } from 'passport-42'
-import { IsNumberString, IsPositive } from 'class-validator'
 
 @Controller('channels')
 @UseGuards(AuthenticatedGuard)
@@ -145,7 +144,7 @@ export class ChatController {
     const channel = await this.channelService.getFullChannel(id)
     const user: User | null = await this.usersService.findUser(+target.data[0])
     if (isNaN(+target.data[1])) {
-      throw new BadRequestException(`Invalid duration ${+target.data[1]}`)
+      throw new BadRequestException('Invalid duration')
     }
     if (user == null) {
       throw new NotFoundException(`User #${+target.data[0]} not found`)
@@ -174,7 +173,7 @@ export class ChatController {
     const channel = await this.channelService.getFullChannel(id)
     const user: User | null = await this.usersService.findUser(+mute.data[0])
     if (isNaN(+mute.data[1])) {
-      throw new BadRequestException(`Invalid duration ${+mute.data[1]}`)
+      throw new BadRequestException('Invalid duration')
     }
     if (user == null) {
       throw new NotFoundException(`User #${+mute.data[0]} not found`)
diff --git a/back/src/chat/chat.gateway.ts b/back/src/chat/chat.gateway.ts
index 8744fd4..e80bd5c 100644
--- a/back/src/chat/chat.gateway.ts
+++ b/back/src/chat/chat.gateway.ts
@@ -98,7 +98,7 @@ export class ChatGateway implements OnGatewayConnection, OnGatewayDisconnect {
     if (connect == null) return false;
     const channel = await this.chatService.getFullChannel(connect.channel);
     if (connect.user === channel.owner.ftId) {
-      this.server.in(channel.id.toString()).emit('kicked');
+      this.server.in(channel.id.toString()).emit('deleted');
       await this.chatService.removeChannel(channel.id);
     } else {
       channel.users = channel.users.filter((usr: User) => usr.ftId !== connect.user);
@@ -114,8 +114,8 @@ export class ChatGateway implements OnGatewayConnection, OnGatewayDisconnect {
     let channel: Channel | null = null
     channel = await this.chatService.getChannel(message.ChannelId).catch(() => { return null })
     if (channel == null) {
-      this.server.to(socket.id).emit('kicked')
-      throw new WsException('Channel has been removed by owner');
+      this.server.to(socket.id).emit('deleted')
+      throw new WsException('Channel has been deleted');
     }
     if (await this.chatService.isMuted(channel.id, message.UserId)) {
       throw new WsException('You are muted');
diff --git a/back/src/chat/dto/updateUser.dto.ts b/back/src/chat/dto/updateUser.dto.ts
index ca11d95..d13d70c 100644
--- a/back/src/chat/dto/updateUser.dto.ts
+++ b/back/src/chat/dto/updateUser.dto.ts
@@ -1,4 +1,5 @@
-import { IsEmail, IsNumber, IsString } from 'class-validator'
+import { Type } from 'class-transformer'
+import { IsArray, IsEmail, IsNumber, IsPositive, IsString } from 'class-validator'
 
 export class IdDto {
   @IsNumber()
@@ -11,7 +12,11 @@ export class PasswordDto {
 }
 
 export class MuteDto {
-  data: number[]
+  @Type(() => Number)
+  @IsArray()
+  @IsNumber({}, { each: true })
+  @IsPositive({ each: true })
+    data: number[]
 }
 
 export class EmailDto {
diff --git a/front/src/components/Alert/Alert.svelte b/front/src/components/Alert/Alert.svelte
index 68d6272..0cd6189 100644
--- a/front/src/components/Alert/Alert.svelte
+++ b/front/src/components/Alert/Alert.svelte
@@ -1,6 +1,5 @@
 <script lang="ts">
   import { onMount, onDestroy } from "svelte";
-    import { get } from "svelte/store";
   import { content, popup } from "./content";
 
   export let message: string;
diff --git a/front/src/components/Channels.svelte b/front/src/components/Channels.svelte
index 47133c7..385d1c1 100644
--- a/front/src/components/Channels.svelte
+++ b/front/src/components/Channels.svelte
@@ -242,8 +242,8 @@
 <div class="overlay">
   <div class="channels" on:click|stopPropagation on:keydown|stopPropagation>
     <div>
+      <h2 >Channels <button class="refresh"  on:click={() => getChannels()}>🔄</button> </h2>
       {#if channels.length > 0}
-        <h2 >Channels <button class="refresh"  on:click={() => getChannels()}>🔄</button> </h2>
         {#each channels as channel}
           <li>
             <span>{channel.name} : {channel.id}</span>
diff --git a/front/src/components/Chat.svelte b/front/src/components/Chat.svelte
index 271fd9f..748da52 100644
--- a/front/src/components/Chat.svelte
+++ b/front/src/components/Chat.svelte
@@ -108,6 +108,11 @@
       setAppState(APPSTATE.HOME);
     })
 
+    socket.on("deleted", () => {
+      show_popup(`Channel has been deleted`, false);
+      setAppState(APPSTATE.HOME);
+    })
+
     console.log("Try to join channel: ", $store.ftId, channel.id);
   });
 
@@ -170,6 +175,7 @@
       );
       const duration = $content;
       if (duration === "") return
+      if (isNaN(Number(duration)) || Number(duration) < 0) return await show_popup("Invalid duration", false);
       const body: MuteDto = {
         data: [target.ftId, duration]
       }
@@ -191,7 +197,7 @@
         };
         socket.emit("kickUser", data);
       } else {
-         const error = await response.json();
+        const error = await response.json();
         await show_popup(error.message, false)
       } 
     }
@@ -224,6 +230,7 @@
     await show_popup("Enter mute duration in seconds");
     const muteDuration = $content;
     if (muteDuration === "") return;
+    if (isNaN(Number(muteDuration)) || Number(muteDuration) < 0) return await show_popup("Invalid duration", false);
     let response = await fetch(API_URL + "/users/" + username + "/byname", {
       credentials: "include",
       mode: "cors",
@@ -371,8 +378,8 @@
               <button on:click={() => banUser(member.username)}> ban </button>
               <button on:click={() => kickUser(member.username)}> kick </button>
               <button on:click={() => muteUser(member.username)}> mute </button>
-              <button on:click={() => removeAdminUser(member.username)}> demote </button>
               <button on:click={() => adminUser(member.username)}> promote </button>
+              <button on:click={() => removeAdminUser(member.username)}> demote </button>
             </p>
           </li>
         {/each}
diff --git a/front/src/components/Friends.svelte b/front/src/components/Friends.svelte
index 6b6f102..45f5651 100644
--- a/front/src/components/Friends.svelte
+++ b/front/src/components/Friends.svelte
@@ -36,7 +36,6 @@
   let friends: Friend[] = [];
   let invits: Friend[] = [];
   let friendsInterval: ReturnType<typeof setInterval>;
-  let blockedUsers: Array<Friend> = [];
 
   onMount(() => {
     getFriends();
@@ -68,27 +67,11 @@
 
   let showUserMenu = false;
   let selectedUser: string | null = null;
-  function openUserMenu(username: string) {
-    showUserMenu = true;
-    selectedUser = username;
-  }
-  function closeUserMenu() {
-    showUserMenu = false;
-    selectedUser = "";
-  }
-
 </script>
 
 <div class="overlay">
   <div class="friends" on:click|stopPropagation on:keydown|stopPropagation>
     <div>
-      <li>
-        <span class="message-name" 
-          on:click={() => dispatch("view-profile", $store.username)}
-          on:keydown={() => dispatch("view-profile", $store.username)}
-        style="cursor: pointer;"
-      >{$store.username} is {$store.status}</span> 
-      </li>
       <h2>{$store.username} friends:</h2>
       {#if friends.length > 0}
         <div class="friends-list">
diff --git a/front/src/components/Pong/Pong.svelte b/front/src/components/Pong/Pong.svelte
index 59d91a4..0cc87ee 100644
--- a/front/src/components/Pong/Pong.svelte
+++ b/front/src/components/Pong/Pong.svelte
@@ -101,7 +101,7 @@
         gamePlaying = true;
       } else {
         gamePlaying = false;
-        popup.set(bind(Alert, { message: "Failed to invite user. Is he currently connected to the game?", form: false }))
+        show_popup("Failed to invite user. Is he currently connected to the game?", false)
       }
     });
     socket.on(GAME_EVENTS.MATCHMAKING, (data: MatchmakingDto) => {
diff --git a/front/src/components/Profile.svelte b/front/src/components/Profile.svelte
index 9e207f4..2b2b033 100644
--- a/front/src/components/Profile.svelte
+++ b/front/src/components/Profile.svelte
@@ -100,7 +100,7 @@
 
   async function handleSubmit() {
     if (gamePlaying) {
-      popup.set(bind(Alert, { message: "Cannot change username while playing.", form: false }))
+      await show_popup("Cannot change username while playing.", false)
       return;
     }
 
@@ -125,11 +125,11 @@
     if (response.ok) {
       $store.username = username;
       $store.email = email;
-      popup.set(bind(Alert, { message: "Succefully changed informations.", form: false }))
+      await show_popup("Succefully changed informations.", false)
       resetGameConnection();
     } else {
       const error = await response.json();
-      popup.set(bind(Alert, { message: error.message, form: false}))
+      await show_popup(error.message, false)
     }
   }
 
@@ -143,17 +143,14 @@
       credentials: "include",
     });
     if (response.ok) {
-      popup.set(bind(Alert, {
-        message: "Succefully " + (user.twoFA ? "enabled" : "disabled") + " 2FA",
-        form : false
-      }))
+      await show_popup("Succefully " + (user.twoFA ? "enabled" : "disabled") + " 2FA", false)
     }
   }
 </script>
 
 <div class="overlay">
   <div class="profile" on:click|stopPropagation on:keydown|stopPropagation>
-    <h3>===| <mark>{username}'s Profile</mark> |===</h3>
+    <h3>===| <mark>{username}</mark> |===</h3>
     <div class="profile-header">
       {#if !edit}
         <img src={`${API_URL}/users/${user.ftId}/avatar`} alt="avatar" class="profile-img" />