diff --git a/src/Discord.Net.Core/CDN.cs b/src/Discord.Net.Core/CDN.cs
index 0fefc9a0d..32ffbba90 100644
--- a/src/Discord.Net.Core/CDN.cs
+++ b/src/Discord.Net.Core/CDN.cs
@@ -23,7 +23,7 @@ namespace Discord
         /// </summary>
         /// <param name="userId">The user snowflake identifier.</param>
         /// <param name="avatarId">The avatar identifier.</param>
-        /// <param name="size">The size of the image to return in. This can be any power of two between 16 and 2048.</param>
+        /// <param name="size">The size of the image to return in horizontal pixels. This can be any power of two between 16 and 2048.</param>
         /// <param name="format">The format to return.</param>
         /// <returns>
         ///     A URL pointing to the user's avatar in the specified size.
@@ -76,6 +76,22 @@ namespace Discord
         /// </returns>
         public static string GetChannelIconUrl(ulong channelId, string iconId)
             => iconId != null ? $"{DiscordConfig.CDNUrl}channel-icons/{channelId}/{iconId}.jpg" : null;
+
+        /// <summary>
+        ///     Returns a guild banner URL.
+        /// </summary>
+        /// <param name="guildId">The guild snowflake identifier.</param>
+        /// <param name="bannerId">The banner image identifier.</param>
+        /// <param name="size">The size of the image to return in horizontal pixels. This can be any power of two between 16 and 2048 inclusive.</param>
+        /// <returns>
+        ///     A URL pointing to the guild's banner image.
+        /// </returns>
+        public static string GetGuildBannerUrl(ulong guildId, string bannerId, ushort? size = null)
+        {
+            if (!string.IsNullOrEmpty(bannerId))
+                return $"{DiscordConfig.CDNUrl}banners/{guildId}/{bannerId}.jpg" + (size.HasValue ? $"?size={size}" : string.Empty);
+            return null;
+        }
         /// <summary>
         ///     Returns an emoji URL.
         /// </summary>
diff --git a/src/Discord.Net.Core/Entities/Guilds/GuildProperties.cs b/src/Discord.Net.Core/Entities/Guilds/GuildProperties.cs
index e6d21a463..e13536a97 100644
--- a/src/Discord.Net.Core/Entities/Guilds/GuildProperties.cs
+++ b/src/Discord.Net.Core/Entities/Guilds/GuildProperties.cs
@@ -70,5 +70,19 @@ namespace Discord
         ///     Gets or sets the explicit content filter level of this guild.
         /// </summary>
         public Optional<ExplicitContentFilterLevel> ExplicitContentFilter { get; set; }
+        /// <summary>
+        ///     Gets or sets the flags that DISABLE types of system channel messages.
+        /// </summary>
+        /// <remarks>
+        ///     These flags are inverted. Setting a flag will disable that system channel message from being sent.
+        ///     A value of <see cref="SystemChannelMessageDeny.None"/> will allow all system channel message types to be sent,
+        ///     given that the <see cref="SystemChannelId"/> has also been set.
+        ///     A value of <see cref="SystemChannelMessageDeny.GuildBoost"/> will deny guild boost messages from being sent, and allow all
+        ///     other types of messages.
+        ///     Refer to the extension methods <see cref="GuildExtensions.GetGuildBoostMessagesEnabled(IGuild)"/> and
+        ///     <see cref="GuildExtensions.GetWelcomeMessagesEnabled(IGuild)"/> to check if these system channel message types
+        ///     are enabled, without the need to manipulate the logic of the flag.
+        /// </remarks>
+        public Optional<SystemChannelMessageDeny> SystemChannelFlags { get; set; }
     }
 }
diff --git a/src/Discord.Net.Core/Entities/Guilds/IGuild.cs b/src/Discord.Net.Core/Entities/Guilds/IGuild.cs
index 571afef15..378ca069b 100644
--- a/src/Discord.Net.Core/Entities/Guilds/IGuild.cs
+++ b/src/Discord.Net.Core/Entities/Guilds/IGuild.cs
@@ -196,6 +196,58 @@ namespace Discord
         ///     A read-only collection of roles found within this guild.
         /// </returns>
         IReadOnlyCollection<IRole> Roles { get; }
+        /// <summary>
+        ///     Gets the tier of guild boosting in this guild.
+        /// </summary>
+        /// <returns>
+        ///     The tier of guild boosting in this guild.
+        /// </returns>
+        PremiumTier PremiumTier { get; }
+        /// <summary>
+        ///     Gets the identifier for this guilds banner image.
+        /// </summary>
+        /// <returns>
+        ///     An identifier for the banner image; <c>null</c> if none is set.
+        /// </returns>
+        string BannerId { get; }
+        /// <summary>
+        ///     Gets the URL of this guild's banner image.
+        /// </summary>
+        /// <returns>
+        ///     A URL pointing to the guild's banner image; <c>null</c> if none is set.
+        /// </returns>
+        string BannerUrl { get; }
+        /// <summary>
+        ///     Gets the code for this guild's vanity invite URL.
+        /// </summary>
+        /// <returns>
+        ///     A string containing the vanity invite code for this guild; <c>null</c> if none is set.
+        /// </returns>
+        string VanityURLCode { get; }
+        /// <summary>
+        ///     Gets the flags for the types of system channel messages that are disabled.
+        /// </summary>
+        /// <returns>
+        ///     The flags for the types of system channel messages that are disabled.
+        /// </returns>
+        SystemChannelMessageDeny SystemChannelFlags { get; }
+        /// <summary>
+        ///     Gets the description for the guild.
+        /// </summary>
+        /// <returns>
+        ///     The description for the guild; <c>null</c> if none is set.
+        /// </returns>
+        string Description { get; }
+        /// <summary>
+        ///     Gets the number of premium subscribers of this guild.
+        /// </summary>
+        /// <remarks>
+        ///     This is the number of users who have boosted this guild.
+        /// </remarks>
+        /// <returns>
+        ///     The number of premium subscribers of this guild.
+        /// </returns>
+        int PremiumSubscriptionCount { get; }
 
         /// <summary>
         ///     Modifies this guild.
diff --git a/src/Discord.Net.Core/Entities/Guilds/PremiumTier.cs b/src/Discord.Net.Core/Entities/Guilds/PremiumTier.cs
new file mode 100644
index 000000000..b7e4c9323
--- /dev/null
+++ b/src/Discord.Net.Core/Entities/Guilds/PremiumTier.cs
@@ -0,0 +1,22 @@
+namespace Discord
+{
+    public enum PremiumTier
+    {
+        /// <summary>
+        ///     Used for guilds that have no guild boosts.
+        /// </summary>
+        None = 0,
+        /// <summary>
+        ///     Used for guilds that have Tier 1 guild boosts.
+        /// </summary>
+        Tier1 = 1,
+        /// <summary>
+        ///     Used for guilds that have Tier 2 guild boosts.
+        /// </summary>
+        Tier2 = 2,
+        /// <summary>
+        ///     Used for guilds that have Tier 3 guild boosts.
+        /// </summary>
+        Tier3 = 3
+    }
+}
diff --git a/src/Discord.Net.Core/Entities/Guilds/SystemChannelMessageDeny.cs b/src/Discord.Net.Core/Entities/Guilds/SystemChannelMessageDeny.cs
new file mode 100644
index 000000000..3f69693d0
--- /dev/null
+++ b/src/Discord.Net.Core/Entities/Guilds/SystemChannelMessageDeny.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace Discord
+{
+    [Flags]
+    public enum SystemChannelMessageDeny
+    {
+        /// <summary>
+        ///     Deny none of the system channel messages.
+        ///     This will enable all of the system channel messages.
+        /// </summary>
+        None = 0,
+        /// <summary>
+        ///     Deny the messages that are sent when a user joins the guild.
+        /// </summary>
+        WelcomeMessage = 0b1,
+        /// <summary>
+        ///     Deny the messages that are sent when a user boosts the guild.
+        /// </summary>
+        GuildBoost = 0b10
+    }
+}
diff --git a/src/Discord.Net.Core/Entities/Messages/MessageType.cs b/src/Discord.Net.Core/Entities/Messages/MessageType.cs
index 8f3af843b..66b49e557 100644
--- a/src/Discord.Net.Core/Entities/Messages/MessageType.cs
+++ b/src/Discord.Net.Core/Entities/Messages/MessageType.cs
@@ -36,6 +36,22 @@ namespace Discord
         /// <summary>
         ///     The message when a new member joined.
         /// </summary>
-        GuildMemberJoin = 7
+        GuildMemberJoin = 7,
+        /// <summary>
+        ///     The message for when a user boosts a guild.
+        /// </summary>
+        UserPremiumGuildSubscription = 8,
+        /// <summary>
+        ///     The message for when a guild reaches Tier 1 of Nitro boosts.
+        /// </summary>
+        UserPremiumGuildSubscriptionTier1 = 9,
+        /// <summary>
+        ///     The message for when a guild reaches Tier 2 of Nitro boosts.
+        /// </summary>
+        UserPremiumGuildSubscriptionTier2 = 10,
+        /// <summary>
+        ///     The message for when a guild reaches Tier 3 of Nitro boosts.
+        /// </summary>
+        UserPremiumGuildSubscriptionTier3 = 11
     }
 }
diff --git a/src/Discord.Net.Core/Entities/Users/IGuildUser.cs b/src/Discord.Net.Core/Entities/Users/IGuildUser.cs
index 718587ae4..d162b5164 100644
--- a/src/Discord.Net.Core/Entities/Users/IGuildUser.cs
+++ b/src/Discord.Net.Core/Entities/Users/IGuildUser.cs
@@ -48,6 +48,13 @@ namespace Discord
         /// </returns>
         ulong GuildId { get; }
         /// <summary>
+        ///     Gets the date and time for when this user's guild boost began.
+        /// </summary>
+        /// <returns>
+        ///     A <see cref="DateTimeOffset"/> for when the user began boosting this guild; <c>null</c> if they are not boosting the guild.
+        /// </returns>
+        DateTimeOffset? PremiumSince { get; }
+        /// <summary>
         ///     Gets a collection of IDs for the roles that this user currently possesses in the guild.
         /// </summary>
         /// <remarks>
diff --git a/src/Discord.Net.Core/Extensions/GuildExtensions.cs b/src/Discord.Net.Core/Extensions/GuildExtensions.cs
new file mode 100644
index 000000000..58b749cc4
--- /dev/null
+++ b/src/Discord.Net.Core/Extensions/GuildExtensions.cs
@@ -0,0 +1,24 @@
+namespace Discord
+{
+    /// <summary>
+    ///     An extension class for <see cref="IGuild"/>.
+    /// </summary>
+    public static class GuildExtensions
+    {
+        /// <summary>
+        ///     Gets if welcome system messages are enabled.
+        /// </summary>
+        /// <param name="guild"> The guild to check. </param>
+        /// <returns> A <c>bool</c> indicating if the welcome messages are enabled in the system channel. </returns>
+        public static bool GetWelcomeMessagesEnabled(this IGuild guild)
+            => !guild.SystemChannelFlags.HasFlag(SystemChannelMessageDeny.WelcomeMessage);
+
+        /// <summary>
+        ///     Gets if guild boost system messages are enabled.
+        /// </summary>
+        /// <param name="guild"> The guild to check. </param>
+        /// <returns> A <c>bool</c> indicating if the guild boost messages are enabled in the system channel. </returns>
+        public static bool GetGuildBoostMessagesEnabled(this IGuild guild)
+            => !guild.SystemChannelFlags.HasFlag(SystemChannelMessageDeny.GuildBoost);
+    }
+}
diff --git a/src/Discord.Net.Rest/API/Common/Guild.cs b/src/Discord.Net.Rest/API/Common/Guild.cs
index a84b55a93..343d5b12c 100644
--- a/src/Discord.Net.Rest/API/Common/Guild.cs
+++ b/src/Discord.Net.Rest/API/Common/Guild.cs
@@ -45,5 +45,18 @@ namespace Discord.API
         public ulong? ApplicationId { get; set; }
         [JsonProperty("system_channel_id")]
         public ulong? SystemChannelId { get; set; }
+        [JsonProperty("premium_tier")]
+        public PremiumTier PremiumTier { get; set; }
+        [JsonProperty("vanity_url_code")]
+        public string VanityURLCode { get; set; }
+        [JsonProperty("banner")]
+        public string Banner { get; set; }
+        [JsonProperty("description")]
+        public string Description { get; set; }
+        // this value is inverted, flags set will turn OFF features
+        [JsonProperty("system_channel_flags")]
+        public SystemChannelMessageDeny SystemChannelFlags { get; set; }
+        [JsonProperty("premium_subscription_count")]
+        public int? PremiumSubscriptionCount { get; set; }
     }
 }
diff --git a/src/Discord.Net.Rest/API/Common/GuildMember.cs b/src/Discord.Net.Rest/API/Common/GuildMember.cs
index 24ad17c14..940eb925a 100644
--- a/src/Discord.Net.Rest/API/Common/GuildMember.cs
+++ b/src/Discord.Net.Rest/API/Common/GuildMember.cs
@@ -1,4 +1,4 @@
-#pragma warning disable CS1591
+#pragma warning disable CS1591
 using Newtonsoft.Json;
 using System;
 
@@ -18,5 +18,7 @@ namespace Discord.API
         public Optional<bool> Deaf { get; set; }
         [JsonProperty("mute")]
         public Optional<bool> Mute { get; set; }
+        [JsonProperty("premium_since")]
+        public Optional<DateTimeOffset?> PremiumSince { get; set; }
     }
 }
diff --git a/src/Discord.Net.Rest/API/Rest/ModifyGuildParams.cs b/src/Discord.Net.Rest/API/Rest/ModifyGuildParams.cs
index ba70c58d6..9c519d3a8 100644
--- a/src/Discord.Net.Rest/API/Rest/ModifyGuildParams.cs
+++ b/src/Discord.Net.Rest/API/Rest/ModifyGuildParams.cs
@@ -30,5 +30,7 @@ namespace Discord.API.Rest
         public Optional<ulong> OwnerId { get; set; }
         [JsonProperty("explicit_content_filter")]
         public Optional<ExplicitContentFilterLevel> ExplicitContentFilter { get; set; }
+        [JsonProperty("system_channel_flags")]
+        public Optional<SystemChannelMessageDeny> SystemChannelFlags { get; set; }
     }
 }
diff --git a/src/Discord.Net.Rest/Entities/Guilds/GuildHelper.cs b/src/Discord.Net.Rest/Entities/Guilds/GuildHelper.cs
index cfb7c4ff7..a9b51c113 100644
--- a/src/Discord.Net.Rest/Entities/Guilds/GuildHelper.cs
+++ b/src/Discord.Net.Rest/Entities/Guilds/GuildHelper.cs
@@ -33,7 +33,8 @@ namespace Discord.Rest
                 Name = args.Name,
                 Splash = args.Splash.IsSpecified ? args.Splash.Value?.ToModel() : Optional.Create<ImageModel?>(),
                 VerificationLevel = args.VerificationLevel,
-                ExplicitContentFilter = args.ExplicitContentFilter
+                ExplicitContentFilter = args.ExplicitContentFilter,
+                SystemChannelFlags = args.SystemChannelFlags
             };
 
             if (args.AfkChannel.IsSpecified)
@@ -64,6 +65,9 @@ namespace Discord.Rest
             if (args.ExplicitContentFilter.IsSpecified)
                 apiArgs.ExplicitContentFilter = args.ExplicitContentFilter.Value;
 
+            if (args.SystemChannelFlags.IsSpecified)
+                apiArgs.SystemChannelFlags = args.SystemChannelFlags.Value;
+
             return await client.ApiClient.ModifyGuildAsync(guild.Id, apiArgs, options).ConfigureAwait(false);
         }
         /// <exception cref="ArgumentNullException"><paramref name="func"/> is <c>null</c>.</exception>
diff --git a/src/Discord.Net.Rest/Entities/Guilds/RestGuild.cs b/src/Discord.Net.Rest/Entities/Guilds/RestGuild.cs
index 902d2c9a8..7ed258155 100644
--- a/src/Discord.Net.Rest/Entities/Guilds/RestGuild.cs
+++ b/src/Discord.Net.Rest/Entities/Guilds/RestGuild.cs
@@ -52,6 +52,18 @@ namespace Discord.Rest
         internal bool Available { get; private set; }
         /// <inheritdoc />
         public ulong? ApplicationId { get; private set; }
+        /// <inheritdoc />
+        public PremiumTier PremiumTier { get; private set; }
+        /// <inheritdoc />
+        public string BannerId { get; private set; }
+        /// <inheritdoc />
+        public string VanityURLCode { get; private set; }
+        /// <inheritdoc />
+        public SystemChannelMessageDeny SystemChannelFlags { get; private set; }
+        /// <inheritdoc />
+        public string Description { get; private set; }
+        /// <inheritdoc />
+        public int PremiumSubscriptionCount { get; private set; }
 
         /// <inheritdoc />
         public DateTimeOffset CreatedAt => SnowflakeUtils.FromSnowflake(Id);
@@ -62,6 +74,8 @@ namespace Discord.Rest
         public string IconUrl => CDN.GetGuildIconUrl(Id, IconId);
         /// <inheritdoc />
         public string SplashUrl => CDN.GetGuildSplashUrl(Id, SplashId);
+        /// <inheritdoc />
+        public string BannerUrl => CDN.GetGuildBannerUrl(Id, BannerId);
 
         /// <summary>
         ///     Gets the built-in role containing all users in this guild.
@@ -104,6 +118,12 @@ namespace Discord.Rest
             DefaultMessageNotifications = model.DefaultMessageNotifications;
             ExplicitContentFilter = model.ExplicitContentFilter;
             ApplicationId = model.ApplicationId;
+            PremiumTier = model.PremiumTier;
+            VanityURLCode = model.VanityURLCode;
+            BannerId = model.Banner;
+            SystemChannelFlags = model.SystemChannelFlags;
+            Description = model.Description;
+            PremiumSubscriptionCount = model.PremiumSubscriptionCount.GetValueOrDefault();
 
             if (model.Emojis != null)
             {
diff --git a/src/Discord.Net.Rest/Entities/Users/RestGuildUser.cs b/src/Discord.Net.Rest/Entities/Users/RestGuildUser.cs
index e59d92407..27a910576 100644
--- a/src/Discord.Net.Rest/Entities/Users/RestGuildUser.cs
+++ b/src/Discord.Net.Rest/Entities/Users/RestGuildUser.cs
@@ -14,6 +14,7 @@ namespace Discord.Rest
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
     public class RestGuildUser : RestUser, IGuildUser
     {
+        private long? _premiumSinceTicks;
         private long? _joinedAtTicks;
         private ImmutableArray<ulong> _roleIds;
 
@@ -24,7 +25,8 @@ namespace Discord.Rest
         public bool IsDeafened { get; private set; }
         /// <inheritdoc />
         public bool IsMuted { get; private set; }
-
+        /// <inheritdoc />
+        public DateTimeOffset? PremiumSince => DateTimeUtils.FromTicks(_premiumSinceTicks);
         /// <inheritdoc />
         public ulong GuildId => Guild.Id;
 
@@ -69,6 +71,8 @@ namespace Discord.Rest
                 IsMuted = model.Mute.Value;
             if (model.Roles.IsSpecified)
                 UpdateRoles(model.Roles.Value);
+            if (model.PremiumSince.IsSpecified)
+                _premiumSinceTicks = model.PremiumSince.Value?.UtcTicks;
         }
         private void UpdateRoles(ulong[] roleIds)
         {
diff --git a/src/Discord.Net.Rest/Entities/Users/RestWebhookUser.cs b/src/Discord.Net.Rest/Entities/Users/RestWebhookUser.cs
index bee4892fe..67914e873 100644
--- a/src/Discord.Net.Rest/Entities/Users/RestWebhookUser.cs
+++ b/src/Discord.Net.Rest/Entities/Users/RestWebhookUser.cs
@@ -13,6 +13,8 @@ namespace Discord.Rest
         /// <inheritdoc />
         public ulong WebhookId { get; }
         internal IGuild Guild { get; }
+        /// <inheritdoc />
+        public DateTimeOffset? PremiumSince { get; private set; }
 
         /// <inheritdoc />
         public override bool IsWebhook => true;
diff --git a/src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs b/src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs
index d952b3d92..d5cbfdd64 100644
--- a/src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs
+++ b/src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs
@@ -93,6 +93,18 @@ namespace Discord.WebSocket
         public string IconId { get; private set; }
         /// <inheritdoc />
         public string SplashId { get; private set; }
+        /// <inheritdoc />
+        public PremiumTier PremiumTier { get; private set; }
+        /// <inheritdoc />
+        public string BannerId { get; private set; }
+        /// <inheritdoc />
+        public string VanityURLCode { get; private set; }
+        /// <inheritdoc />
+        public SystemChannelMessageDeny SystemChannelFlags { get; private set; }
+        /// <inheritdoc />
+        public string Description { get; private set; }
+        /// <inheritdoc />
+        public int PremiumSubscriptionCount { get; private set; }
 
         /// <inheritdoc />
         public DateTimeOffset CreatedAt => SnowflakeUtils.FromSnowflake(Id);
@@ -100,6 +112,8 @@ namespace Discord.WebSocket
         public string IconUrl => CDN.GetGuildIconUrl(Id, IconId);
         /// <inheritdoc />
         public string SplashUrl => CDN.GetGuildSplashUrl(Id, SplashId);
+        /// <inheritdoc />
+        public string BannerUrl => CDN.GetGuildBannerUrl(Id, BannerId);
         /// <summary> Indicates whether the client has all the members downloaded to the local guild cache. </summary>
         public bool HasAllMembers => MemberCount == DownloadedMemberCount;// _downloaderPromise.Task.IsCompleted;
         /// <summary> Indicates whether the guild cache is synced to this guild. </summary>
@@ -354,6 +368,12 @@ namespace Discord.WebSocket
             DefaultMessageNotifications = model.DefaultMessageNotifications;
             ExplicitContentFilter = model.ExplicitContentFilter;
             ApplicationId = model.ApplicationId;
+            PremiumTier = model.PremiumTier;
+            VanityURLCode = model.VanityURLCode;
+            BannerId = model.Banner;
+            SystemChannelFlags = model.SystemChannelFlags;
+            Description = model.Description;
+            PremiumSubscriptionCount = model.PremiumSubscriptionCount.GetValueOrDefault();
 
             if (model.Emojis != null)
             {
diff --git a/src/Discord.Net.WebSocket/Entities/Users/SocketGuildUser.cs b/src/Discord.Net.WebSocket/Entities/Users/SocketGuildUser.cs
index 659a2eeea..dee450cdd 100644
--- a/src/Discord.Net.WebSocket/Entities/Users/SocketGuildUser.cs
+++ b/src/Discord.Net.WebSocket/Entities/Users/SocketGuildUser.cs
@@ -18,6 +18,7 @@ namespace Discord.WebSocket
     [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
     public class SocketGuildUser : SocketUser, IGuildUser
     {
+        private long? _premiumSinceTicks;
         private long? _joinedAtTicks;
         private ImmutableArray<ulong> _roleIds;
 
@@ -75,6 +76,8 @@ namespace Discord.WebSocket
         /// </returns>
         public SocketVoiceState? VoiceState => Guild.GetVoiceState(Id);
         public AudioInStream AudioStream => Guild.GetAudioStream(Id);
+        /// <inheritdoc />
+        public DateTimeOffset? PremiumSince => DateTimeUtils.FromTicks(_premiumSinceTicks);
 
         /// <summary>
         ///     Returns the position of the user within the role hierarchy.
@@ -135,6 +138,8 @@ namespace Discord.WebSocket
                 Nickname = model.Nick.Value;
             if (model.Roles.IsSpecified)
                 UpdateRoles(model.Roles.Value);
+            if (model.PremiumSince.IsSpecified)
+                _premiumSinceTicks = model.PremiumSince.Value?.UtcTicks;
         }
         internal void Update(ClientState state, PresenceModel model, bool updatePresence)
         {
diff --git a/src/Discord.Net.WebSocket/Entities/Users/SocketWebhookUser.cs b/src/Discord.Net.WebSocket/Entities/Users/SocketWebhookUser.cs
index 3169be682..2d701ef64 100644
--- a/src/Discord.Net.WebSocket/Entities/Users/SocketWebhookUser.cs
+++ b/src/Discord.Net.WebSocket/Entities/Users/SocketWebhookUser.cs
@@ -63,6 +63,8 @@ namespace Discord.WebSocket
         /// <inheritdoc />
         string IGuildUser.Nickname => null;
         /// <inheritdoc />
+        DateTimeOffset? IGuildUser.PremiumSince => null;
+        /// <inheritdoc />
         GuildPermissions IGuildUser.GuildPermissions => GuildPermissions.Webhook;
 
         /// <inheritdoc />