diff --git a/packages/core/src/biscuit.ts b/packages/core/src/biscuit.ts
index ad7ffac..a1d7b6a 100644
--- a/packages/core/src/biscuit.ts
+++ b/packages/core/src/biscuit.ts
@@ -71,13 +71,13 @@ export type LastCreateApplicationCommands =
  */
 export interface CreateApplicationCommand {
     name: string;
-    nameLocalizations?: Localization;
+    name_localizations?: Localization;
     description: string;
-    descriptionLocalizations?: Localization;
+    description_localizations?: Localization;
     type?: ApplicationCommandTypes;
     options?: DiscordApplicationCommandOption[];
-    defaultMemberPermissions?: PermissionResolvable;
-    dmPermission?: boolean;
+    default_member_permissions?: PermissionResolvable;
+    dm_permission?: boolean;
 }
 
 /**
diff --git a/packages/core/src/builders/slash/ApplicationCommand.ts b/packages/core/src/builders/slash/ApplicationCommand.ts
index 58ced79..97d9bd2 100644
--- a/packages/core/src/builders/slash/ApplicationCommand.ts
+++ b/packages/core/src/builders/slash/ApplicationCommand.ts
@@ -3,7 +3,7 @@ import type { CreateApplicationCommand } from '../../biscuit';
 import { ApplicationCommandTypes } from '@biscuitland/api-types';
 import { OptionBased } from './ApplicationCommandOption';
 
-export abstract class ApplicationCommandBuilder implements CreateApplicationCommand {
+export abstract class ApplicationCommandBuilder {
     constructor(
         type: ApplicationCommandTypes = ApplicationCommandTypes.ChatInput,
         name: string = '',
@@ -100,10 +100,10 @@ export class ChatInputApplicationCommandBuilder extends ApplicationCommandBuilde
             name: this.name,
             description: this.description,
             options: this.options?.map((o) => o.toJSON()) ?? [],
-            defaultMemberPermissions: this.defaultMemberPermissions,
-            nameLocalizations: this.nameLocalizations,
-            descriptionLocalizations: this.descriptionLocalizations,
-            dmPermission: this.dmPermission,
+            default_member_permissions: this.defaultMemberPermissions,
+            name_localizations: this.nameLocalizations,
+            description_localizations: this.descriptionLocalizations,
+            dm_permission: this.dmPermission,
         };
     }
 }
diff --git a/packages/core/src/builders/slash/ApplicationCommandOption.ts b/packages/core/src/builders/slash/ApplicationCommandOption.ts
index 86a4504..293e11f 100644
--- a/packages/core/src/builders/slash/ApplicationCommandOption.ts
+++ b/packages/core/src/builders/slash/ApplicationCommandOption.ts
@@ -108,8 +108,8 @@ export class OptionBuilderLimitedValues extends OptionBuilder {
         return {
             ...super.toJSON(),
             choices: this.choices?.map((c) => c.toJSON()) ?? [],
-            minValue: this.minValue,
-            maxValue: this.maxValue,
+            min_value: this.minValue,
+            max_value: this.maxValue,
         };
     }
 }
@@ -166,7 +166,7 @@ export class OptionBuilderChannel extends OptionBuilder {
     override toJSON(): ApplicationCommandOption {
         return {
             ...super.toJSON(),
-            channelTypes: this.channelTypes ?? [],
+            channel_types: this.channelTypes ?? [],
         };
     }
 }
@@ -323,11 +323,11 @@ export interface ApplicationCommandOption {
     /** 1-32 character name matching lowercase `^[\w-]{1,32}$` */
     name: string;
     /** Localization object for the `name` field. Values follow the same restrictions as `name` */
-    nameLocalizations?: Localization;
+    name_localizations?: Localization;
     /** 1-100 character description */
     description: string;
     /** Localization object for the `description` field. Values follow the same restrictions as `description` */
-    descriptionLocalizations?: Localization;
+    description_localizations?: Localization;
     /** If the parameter is required or optional--default `false` */
     required?: boolean;
     /** Choices for `string` and `int` types for the user to pick from */
@@ -337,9 +337,9 @@ export interface ApplicationCommandOption {
     /** if autocomplete interactions are enabled for this `String`, `Integer`, or `Number` type option */
     autocomplete?: boolean;
     /** If the option is a channel type, the channels shown will be restricted to these types */
-    channelTypes?: ChannelTypes[];
+    channel_types?: ChannelTypes[];
     /** Minimum number desired. */
-    minValue?: number;
+    min_value?: number;
     /** Maximum number desired. */
-    maxValue?: number;
+    max_value?: number;
 }