diff --git a/src/managers/GuildMemberManager.js b/src/managers/GuildMemberManager.js
index 0cf6d6945..e3a4bc6d4 100644
--- a/src/managers/GuildMemberManager.js
+++ b/src/managers/GuildMemberManager.js
@@ -178,12 +178,12 @@ class GuildMemberManager extends BaseManager {
    *   .catch(console.error);
    */
   ban(user, options = { days: 0 }) {
-    if (options.days) options['delete-message-days'] = options.days;
+    if (options.days) options.delete_message_days = options.days;
     const id = this.client.users.resolveID(user);
     if (!id) return Promise.reject(new Error('BAN_RESOLVE_ID', true));
     return this.client.api
       .guilds(this.guild.id)
-      .bans[id].put({ query: options })
+      .bans[id].put({ data: options })
       .then(() => {
         if (user instanceof GuildMember) return user;
         const _user = this.client.users.resolve(id);