diff --git a/lib/exirc/utils.ex b/lib/exirc/utils.ex
index e9c0c35..8d4d3f1 100644
--- a/lib/exirc/utils.ex
+++ b/lib/exirc/utils.ex
@@ -1,182 +1,182 @@
 defmodule ExIrc.Utils do
 
   ######################
   # IRC Message Parsing
   ######################
 
   @doc """
   Parse an IRC message
 
   Example:
 
       data    = ':irc.example.org 005 nick NETWORK=Freenode PREFIX=(ov)@+ CHANTYPES=#&'
       message = ExIrc.Utils.parse data
       assert "irc.example.org" = message.server
   """
   @spec parse(raw_data :: char_list) :: IrcMessage.t
   def parse(raw_data) do
     data = :string.substr(raw_data, 1, length(raw_data))
     case data do
       [?:|_] ->
           [[?:|from]|rest] = :string.tokens(data, ' ')
           get_cmd(rest, parse_from(from, %IrcMessage{ctcp: false}))
       data ->
           get_cmd(:string.tokens(data, ' '), %IrcMessage{ctcp: false})
     end
   end
 
-  @prefix_pattern ~r/^(?<nick>[^!]+)(?:!(?:(?<user>[^@ ]+)@)?(?:(?<host>\S+[\w.:-]+)))?$/
+  @prefix_pattern ~r/^(?<nick>[^!\s]+)(?:!(?<user>[^@\s]+@)?(?<host>\S+))?$/
   defp parse_from(from, msg) do
     from_str = IO.iodata_to_binary(from)
     parts    = Regex.run(@prefix_pattern, from_str, capture: :all_but_first)
     case parts do
       [nick, user, host] ->
         %{msg | nick: nick, user: user, host: host}
       [nick, host] ->
         %{msg | nick: nick, host: host}
       [nick] ->
         if String.contains?(nick, ".") do
           %{msg | server: nick}
         else
           %{msg | nick: nick}
         end
     end
   end
 
   # Parse command from message
   defp get_cmd([cmd, arg1, [?:, 1 | ctcp_trail] | restargs], msg) when cmd == 'PRIVMSG' or cmd == 'NOTICE' do
     get_cmd([cmd, arg1, [1 | ctcp_trail] | restargs], msg)
   end
 
   defp get_cmd([cmd, target, [1 | ctcp_cmd] | cmd_args], msg) when cmd == 'PRIVMSG' or cmd == 'NOTICE' do
     args = cmd_args
       |> Enum.map(&Enum.take_while(&1, fn c -> c != 0o001 end))
       |> Enum.map(&List.to_string/1)
     case args do
       args when args != [] ->
         %{msg |
           cmd:  to_string(ctcp_cmd),
           args: [to_string(target), args |> Enum.join(" ")],
           ctcp: true
         }
       _ ->
         %{msg | cmd: to_string(cmd), ctcp: :invalid}
     end
   end
 
   defp get_cmd([cmd | rest], msg) do
     get_args(rest, %{msg | cmd: to_string(cmd)})
   end
 
 
   # Parse command args from message
   defp get_args([], msg) do
     args = msg.args
     |> Enum.reverse
     |> Enum.filter(fn arg -> arg != [] end)
     |> Enum.map(&trim_crlf/1)
     |> Enum.map(&:binary.list_to_bin/1)
     |> Enum.map(&:unicode.characters_to_binary/1)
     post_process(%{msg | args: args})
   end
 
   defp get_args([[?: | first_arg] | rest], msg) do
     args = (for arg <- [first_arg | rest], do: ' ' ++ trim_crlf(arg)) |> List.flatten
     case args do
       [_] ->
           get_args([], %{msg | args: msg.args})
       [_ | full_trail] ->
           get_args([], %{msg | args: [full_trail | msg.args]})
     end
   end
 
   defp get_args([arg | rest], msg) do
     get_args(rest, %{msg | args: [arg | msg.args]})
   end
 
   # This function allows us to handle special case messages which are not RFC
   # compliant, before passing it to the client.
   defp post_process(%IrcMessage{cmd: "332", args: [nick, channel]} = msg) do
     # Handle malformed RPL_TOPIC messages which contain no topic
     %{msg | :cmd => "331", :args => [channel, "No topic is set"], :nick => nick}
   end
   defp post_process(msg), do: msg
 
   ############################
   # Parse RPL_ISUPPORT (005)
   ############################
 
   @doc """
   Parse RPL_ISUPPORT message.
 
   If an empty list is provided, do nothing, otherwise parse CHANTYPES,
   NETWORK, and PREFIX parameters for relevant data.
   """
   @spec isup(parameters :: list(binary), state :: ExIrc.Client.ClientState.t) :: ExIrc.Client.ClientState.t
   def isup([], state), do: state
   def isup([param | rest], state) do
     try do
       isup(rest, isup_param(param, state))
     rescue
       _ -> isup(rest, state)
     end
   end
 
   defp isup_param("CHANTYPES=" <> channel_prefixes, state) do
     prefixes = channel_prefixes |> String.split("", trim: true)
     %{state | channel_prefixes: prefixes}
   end
   defp isup_param("NETWORK=" <> network, state) do
     %{state | network: network}
   end
   defp isup_param("PREFIX=" <> user_prefixes, state) do
     prefixes = Regex.run(~r/\((.*)\)(.*)/, user_prefixes, capture: :all_but_first)
                |> Enum.map(&String.to_char_list/1)
                |> List.zip
     %{state | user_prefixes: prefixes}
   end
   defp isup_param(_, state) do
     state
   end
 
   ###################
   # Helper Functions
   ###################
 
   @days_of_week   ['Mon','Tue','Wed','Thu','Fri','Sat','Sun']
   @months_of_year ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec']
   @doc """
   Get CTCP formatted time from a tuple representing the current calendar time:
 
   Example:
 
       iex> local_time = {{2013,12,6},{14,5,0}}
       {{2013,12,6},{14,5,0}}
       iex> ExIrc.Utils.ctcp_time local_time
       "Fri Dec 06 14:05:00 2013"
   """
   @spec ctcp_time(datetime :: {{integer, integer, integer}, {integer, integer, integer}}) :: binary
   def ctcp_time({{y, m, d}, {h, n, s}} = _datetime) do
     [:lists.nth(:calendar.day_of_the_week(y,m,d), @days_of_week),
      ' ',
      :lists.nth(m, @months_of_year),
      ' ',
      :io_lib.format("~2..0s", [Integer.to_char_list(d)]),
      ' ',
      :io_lib.format("~2..0s", [Integer.to_char_list(h)]),
      ':',
      :io_lib.format("~2..0s", [Integer.to_char_list(n)]),
      ':',
      :io_lib.format("~2..0s", [Integer.to_char_list(s)]),
      ' ',
      Integer.to_char_list(y)] |> List.flatten |> List.to_string
   end
 
   defp trim_crlf(charlist) do
     case Enum.reverse(charlist) do
       [?\n, ?\r | text] -> Enum.reverse(text)
       _ -> charlist
     end
   end
 
 end