diff --git a/src/Discord.Net.Core/Discord.Net.Core.xml b/src/Discord.Net.Core/Discord.Net.Core.xml
index d8d2d7d16..dc10024a4 100644
--- a/src/Discord.Net.Core/Discord.Net.Core.xml
+++ b/src/Discord.Net.Core/Discord.Net.Core.xml
@@ -6011,7 +6011,7 @@
             <param name="value">The default permission value to set.</param>
             <returns>The current builder.</returns>
         </member>
-        <member name="M:Discord.SlashCommandBuilder.AddOption(System.String,Discord.ApplicationCommandOptionType,System.String,System.Boolean,System.Boolean,System.Boolean,System.Collections.Generic.List{Discord.SlashCommandOptionBuilder},Discord.ApplicationCommandOptionChoiceProperties[])">
+        <member name="M:Discord.SlashCommandBuilder.AddOption(System.String,Discord.ApplicationCommandOptionType,System.String,System.Nullable{System.Boolean},System.Nullable{System.Boolean},System.Boolean,System.Collections.Generic.List{Discord.SlashCommandOptionBuilder},Discord.ApplicationCommandOptionChoiceProperties[])">
             <summary>
                 Adds an option to the current slash command.
             </summary>
@@ -6108,7 +6108,7 @@
             </summary>
             <returns>The built version of this option.</returns>
         </member>
-        <member name="M:Discord.SlashCommandOptionBuilder.AddOption(System.String,Discord.ApplicationCommandOptionType,System.String,System.Boolean,System.Boolean,System.Collections.Generic.List{Discord.SlashCommandOptionBuilder},Discord.ApplicationCommandOptionChoiceProperties[])">
+        <member name="M:Discord.SlashCommandOptionBuilder.AddOption(System.String,Discord.ApplicationCommandOptionType,System.String,System.Nullable{System.Boolean},System.Boolean,System.Collections.Generic.List{Discord.SlashCommandOptionBuilder},Discord.ApplicationCommandOptionChoiceProperties[])">
             <summary>
                 Adds an option to the current slash command.
             </summary>
diff --git a/src/Discord.Net.Core/Entities/Channels/IVoiceChannel.cs b/src/Discord.Net.Core/Entities/Channels/IVoiceChannel.cs
index 9c2d008ee..1d36a41b9 100644
--- a/src/Discord.Net.Core/Entities/Channels/IVoiceChannel.cs
+++ b/src/Discord.Net.Core/Entities/Channels/IVoiceChannel.cs
@@ -6,7 +6,7 @@ namespace Discord
     /// <summary>
     ///     Represents a generic voice channel in a guild.
     /// </summary>
-    public interface IVoiceChannel : INestedChannel, IAudioChannel
+    public interface IVoiceChannel : INestedChannel, IAudioChannel, IMentionable
     {
         /// <summary>
         ///     Gets the bit-rate that the clients in this voice channel are requested to use.
diff --git a/src/Discord.Net.Core/Entities/Interactions/Slash Commands/SlashCommandBuilder.cs b/src/Discord.Net.Core/Entities/Interactions/Slash Commands/SlashCommandBuilder.cs
index 1a152feb4..9581015d0 100644
--- a/src/Discord.Net.Core/Entities/Interactions/Slash Commands/SlashCommandBuilder.cs	
+++ b/src/Discord.Net.Core/Entities/Interactions/Slash Commands/SlashCommandBuilder.cs	
@@ -165,7 +165,7 @@ namespace Discord
         /// <param name="choices">The choices of this option.</param>
         /// <returns>The current builder.</returns>
         public SlashCommandBuilder AddOption(string name, ApplicationCommandOptionType type,
-           string description, bool required = true, bool isDefault = false, bool isAutocomplete = false, List<SlashCommandOptionBuilder> options = null, params ApplicationCommandOptionChoiceProperties[] choices)
+           string description, bool? required = null, bool? isDefault = null, bool isAutocomplete = false, List<SlashCommandOptionBuilder> options = null, params ApplicationCommandOptionChoiceProperties[] choices)
         {
             // Make sure the name matches the requirements from discord
             Preconditions.NotNullOrEmpty(name, nameof(name));
@@ -183,7 +183,7 @@ namespace Discord
             Preconditions.AtMost(description.Length, MaxDescriptionLength, nameof(description));
 
             // make sure theres only one option with default set to true
-            if (isDefault)
+            if (isDefault.HasValue && isDefault.Value)
             {
                 if (this.Options != null)
                     if (this.Options.Any(x => x.Default.HasValue && x.Default.Value))
@@ -339,7 +339,7 @@ namespace Discord
         /// <summary>
         ///     Gets or sets if the option is required.
         /// </summary>
-        public bool Required { get; set; }
+        public bool? Required { get; set; } = null;
 
         /// <summary>
         ///     Gets or sets whether or not this option supports autocomplete.
@@ -395,7 +395,7 @@ namespace Discord
         /// <param name="choices">The choices of this option.</param>
         /// <returns>The current builder.</returns>
         public SlashCommandOptionBuilder AddOption(string name, ApplicationCommandOptionType type,
-           string description, bool required = true, bool isDefault = false, List<SlashCommandOptionBuilder> options = null, params ApplicationCommandOptionChoiceProperties[] choices)
+           string description, bool? required = null, bool isDefault = false, List<SlashCommandOptionBuilder> options = null, params ApplicationCommandOptionChoiceProperties[] choices)
         {
             // Make sure the name matches the requirements from discord
             Preconditions.NotNullOrEmpty(name, nameof(name));
diff --git a/src/Discord.Net.Rest/Discord.Net.Rest.xml b/src/Discord.Net.Rest/Discord.Net.Rest.xml
index 6e6b76d21..ec2584580 100644
--- a/src/Discord.Net.Rest/Discord.Net.Rest.xml
+++ b/src/Discord.Net.Rest/Discord.Net.Rest.xml
@@ -2803,6 +2803,9 @@
         <member name="P:Discord.Rest.RestVoiceChannel.CategoryId">
             <inheritdoc />
         </member>
+        <member name="P:Discord.Rest.RestVoiceChannel.Mention">
+            <inheritdoc />
+        </member>
         <member name="M:Discord.Rest.RestVoiceChannel.Update(Discord.API.Channel)">
             <inheritdoc />
         </member>
diff --git a/src/Discord.Net.Rest/Entities/Channels/RestVoiceChannel.cs b/src/Discord.Net.Rest/Entities/Channels/RestVoiceChannel.cs
index d1d567e27..b8ee8fc93 100644
--- a/src/Discord.Net.Rest/Entities/Channels/RestVoiceChannel.cs
+++ b/src/Discord.Net.Rest/Entities/Channels/RestVoiceChannel.cs
@@ -21,7 +21,8 @@ namespace Discord.Rest
         public int? UserLimit { get; private set; }
         /// <inheritdoc />
         public ulong? CategoryId { get; private set; }
-
+        /// <inheritdoc />
+        public string Mention => MentionUtils.MentionChannel(Id);
         internal RestVoiceChannel(BaseDiscordClient discord, IGuild guild, ulong id)
             : base(discord, guild, id)
         {
diff --git a/src/Discord.Net.WebSocket/Discord.Net.WebSocket.xml b/src/Discord.Net.WebSocket/Discord.Net.WebSocket.xml
index c08906290..10c5d5e8d 100644
--- a/src/Discord.Net.WebSocket/Discord.Net.WebSocket.xml
+++ b/src/Discord.Net.WebSocket/Discord.Net.WebSocket.xml
@@ -2802,6 +2802,9 @@
                 A category channel representing the parent of this channel; <c>null</c> if none is set.
             </returns>
         </member>
+        <member name="P:Discord.WebSocket.SocketVoiceChannel.Mention">
+            <inheritdoc />
+        </member>
         <member name="M:Discord.WebSocket.SocketVoiceChannel.SyncPermissionsAsync(Discord.RequestOptions)">
             <inheritdoc />
         </member>
diff --git a/src/Discord.Net.WebSocket/Entities/Channels/SocketVoiceChannel.cs b/src/Discord.Net.WebSocket/Entities/Channels/SocketVoiceChannel.cs
index f1d61b9b3..9798272b3 100644
--- a/src/Discord.Net.WebSocket/Entities/Channels/SocketVoiceChannel.cs
+++ b/src/Discord.Net.WebSocket/Entities/Channels/SocketVoiceChannel.cs
@@ -32,6 +32,8 @@ namespace Discord.WebSocket
         public ICategoryChannel Category
             => CategoryId.HasValue ? Guild.GetChannel(CategoryId.Value) as ICategoryChannel : null;
         /// <inheritdoc />
+        public string Mention => MentionUtils.MentionChannel(Id);
+        /// <inheritdoc />
         public Task SyncPermissionsAsync(RequestOptions options = null)
             => ChannelHelper.SyncPermissionsAsync(this, Discord, options);
 
diff --git a/test/Discord.Net.Tests.Unit/MockedEntities/MockedVoiceChannel.cs b/test/Discord.Net.Tests.Unit/MockedEntities/MockedVoiceChannel.cs
index 7c3d00fdd..159bfb034 100644
--- a/test/Discord.Net.Tests.Unit/MockedEntities/MockedVoiceChannel.cs
+++ b/test/Discord.Net.Tests.Unit/MockedEntities/MockedVoiceChannel.cs
@@ -25,7 +25,7 @@ namespace Discord
         public string Name => throw new NotImplementedException();
 
         public DateTimeOffset CreatedAt => throw new NotImplementedException();
-
+        public string Mention => throw new NotImplementedException();
         public ulong Id => throw new NotImplementedException();
 
         public Task AddPermissionOverwriteAsync(IRole role, OverwritePermissions permissions, RequestOptions options = null)