diff --git a/lib/command_chat.go b/lib/command_chat.go
index 313a21b..0c3df52 100644
--- a/lib/command_chat.go
+++ b/lib/command_chat.go
@@ -327,6 +327,48 @@ func (o *ChatCommandRoleOption) ApplicationCommandOption() *discordgo.Applicatio
 	}
 }
 
+func (o *ChatCommandRoleOption) Validate() (bool, error) {
+	return validateOption(o)
+}
+
+type ChatCommandMentionableOption struct {
+	Name                     string
+	NameLocalizations        map[discordgo.Locale]string
+	Description              string
+	DescriptionLocalizations map[discordgo.Locale]string
+	Required                 bool
+	Autocomplete             bool
+	Choices                  []*ChatCommandMentionableOptionChoice
+}
+
+type ChatCommandMentionableOptionChoice = ChatCommandStringOptionChoice
+
+func (o *ChatCommandMentionableOption) ApplicationCommandOption() *discordgo.ApplicationCommandOption {
+	choices := make([]*discordgo.ApplicationCommandOptionChoice, len(o.Choices))
+	for i, v := range o.Choices {
+		choices[i] = &discordgo.ApplicationCommandOptionChoice{
+			Name:              v.Name,
+			NameLocalizations: v.NameLocalizations,
+			Value:             any(v.Value),
+		}
+	}
+
+	return &discordgo.ApplicationCommandOption{
+		Type:                     discordgo.ApplicationCommandOptionMentionable,
+		Name:                     o.Name,
+		NameLocalizations:        o.NameLocalizations,
+		Description:              o.Description,
+		DescriptionLocalizations: o.DescriptionLocalizations,
+		Required:                 o.Required,
+		Autocomplete:             o.Autocomplete,
+		Choices:                  choices,
+	}
+}
+
+func (o *ChatCommandMentionableOption) Validate() (bool, error) {
+	return validateOption(o)
+}
+
 func validateOption(opt interface {
 	ApplicationCommandOption() *discordgo.ApplicationCommandOption
 },