diff --git a/src/NadekoBot/Modules/Administration/AdministrationModule.cs b/src/NadekoBot/Modules/Administration/AdministrationModule.cs
index 05011cba..29e2132d 100644
--- a/src/NadekoBot/Modules/Administration/AdministrationModule.cs
+++ b/src/NadekoBot/Modules/Administration/AdministrationModule.cs
@@ -23,7 +23,13 @@ namespace NadekoBot.Modules.Administration
         {
 
         }
+        [LocalizedCommand, LocalizedDescription, LocalizedSummary]
+        [RequireContext(ContextType.Guild)]
+        public async Task cmd(IMessage imsg, [Remainder] string arg)
+        {
+            var channel = imsg.Channel as ITextChannel;
 
+        }
         ////todo owner only
         //[LocalizedCommand, LocalizedDescription, LocalizedSummary]
         //[RequireContext(ContextType.Guild)]
@@ -445,6 +451,7 @@ namespace NadekoBot.Modules.Administration
         public async Task Prune(IMessage msg, int count)
         {
             var channel = msg.Channel as ITextChannel;
+            await msg.DeleteAsync();
             while (count > 0)
             {
                 int limit = (count < 100) ? count : 100;
diff --git a/src/NadekoBot/NadekoBot.cs b/src/NadekoBot/NadekoBot.cs
index c9ea9c23..9131238e 100644
--- a/src/NadekoBot/NadekoBot.cs
+++ b/src/NadekoBot/NadekoBot.cs
@@ -36,7 +36,6 @@ namespace NadekoBot
                 AudioMode = Discord.Audio.AudioMode.Incoming,
                 LargeThreshold = 200,
                 LogLevel = LogSeverity.Warning,
-                MessageCacheSize = 10,
             });
 
             //initialize Services
diff --git a/src/NadekoBot/Services/Impl/YoutubeService.cs b/src/NadekoBot/Services/Impl/YoutubeService.cs
index 31655950..bcc44fa2 100644
--- a/src/NadekoBot/Services/Impl/YoutubeService.cs
+++ b/src/NadekoBot/Services/Impl/YoutubeService.cs
@@ -22,8 +22,14 @@ namespace NadekoBot.Services.Impl
         }
         public async Task<IEnumerable<string>> FindPlaylistIdsByKeywordsAsync(string keywords, int count = 1)
         {
-            Contract.Requires<ArgumentNullException>(!string.IsNullOrWhiteSpace(keywords));
-            Contract.Requires<ArgumentOutOfRangeException>(count > 0);
+            //Contract.Requires<ArgumentNullException>(!string.IsNullOrWhiteSpace(keywords));
+            //Contract.Requires<ArgumentOutOfRangeException>(count > 0);
+
+            if (string.IsNullOrWhiteSpace(keywords))
+                throw new ArgumentNullException(nameof(keywords));
+
+            if (count <= 0)
+                throw new ArgumentOutOfRangeException(nameof(count));
 
             var match = new Regex("(?:youtu\\.be\\/|list=)(?<id>[\\da-zA-Z\\-_]*)").Match(keywords);
             if (match.Length > 1)