diff --git a/lib/discordrb/api/server.rb b/lib/discordrb/api/server.rb
index 9b383299e..135ea0c9b 100644
--- a/lib/discordrb/api/server.rb
+++ b/lib/discordrb/api/server.rb
@@ -200,17 +200,18 @@ def bans(token, server_id, limit = nil, before = nil, after = nil)
     )
   end
 
-  # Ban a user from a server and delete their messages from the last message_days days
+  # Ban a user from a server and delete their messages up to a given amount of time.
   # https://discord.com/developers/docs/resources/guild#create-guild-ban
-  def ban_user(token, server_id, user_id, message_days, reason = nil)
-    reason = URI.encode_www_form_component(reason) if reason
+  def ban_user(token, server_id, user_id, message_seconds, reason = nil)
     Discordrb::API.request(
       :guilds_sid_bans_uid,
       server_id,
       :put,
-      "#{Discordrb::API.api_base}/guilds/#{server_id}/bans/#{user_id}?delete_message_days=#{message_days}&reason=#{reason}",
-      nil,
-      Authorization: token
+      "#{Discordrb::API.api_base}/guilds/#{server_id}/bans/#{user_id}",
+      { delete_message_seconds: message_seconds }.to_json,
+      Authorization: token,
+      content_type: :json,
+      'X-Audit-Log-Reason': reason
     )
   end
 
diff --git a/lib/discordrb/data/member.rb b/lib/discordrb/data/member.rb
index f2cc80b2f..35c639da6 100644
--- a/lib/discordrb/data/member.rb
+++ b/lib/discordrb/data/member.rb
@@ -247,10 +247,17 @@ def server_unmute
     end
 
     # Bans this member from the server.
-    # @param message_days [Integer] How many days worth of messages sent by the member should be deleted.
+    # @param message_days [Integer] How many days worth of messages sent by the member should be deleted. This parameter is deprecated and will be removed in 4.0.
+    # @param message_seconds [Integer] How many seconds worth of messages sent by the member should be deleted.
     # @param reason [String] The reason this member is being banned.
-    def ban(message_days = 0, reason: nil)
-      server.ban(@user, message_days, reason: reason)
+    def ban(message_days = 0, message_seconds: nil, reason: nil)
+      delete_messages = if message_days != 0 && message_days
+                          message_days * 86_400
+                        else
+                          message_seconds || 0
+                        end
+
+      server.ban(@user, delete_messages, reason: reason)
     end
 
     # Unbans this member from the server.
diff --git a/lib/discordrb/data/server.rb b/lib/discordrb/data/server.rb
index 10a7ce02e..8a6f2a062 100644
--- a/lib/discordrb/data/server.rb
+++ b/lib/discordrb/data/server.rb
@@ -610,10 +610,17 @@ def bans(limit: nil, before_id: nil, after_id: nil)
 
     # Bans a user from this server.
     # @param user [User, String, Integer] The user to ban.
-    # @param message_days [Integer] How many days worth of messages sent by the user should be deleted.
+    # @param message_days [Integer] How many days worth of messages sent by the user should be deleted. This is deprecated and will be removed in 4.0.
+    # @param message_seconds [Integer] How many seconds of messages sent by the user should be deleted.
     # @param reason [String] The reason the user is being banned.
-    def ban(user, message_days = 0, reason: nil)
-      API::Server.ban_user(@bot.token, @id, user.resolve_id, message_days, reason)
+    def ban(user, message_days = 0, message_seconds: nil, reason: nil)
+      delete_messages = if message_days != 0 && message_days
+                          message_days * 86_400
+                        else
+                          message_seconds || 0
+                        end
+
+      API::Server.ban_user(@bot.token, @id, user.resolve_id, delete_messages, reason)
     end
 
     # Unbans a previously banned user from this server.