diff --git a/lib/mix_tasks.ex b/lib/mix_tasks.ex
index 147f708..0e781f3 100644
--- a/lib/mix_tasks.ex
+++ b/lib/mix_tasks.ex
@@ -23,7 +23,7 @@ defmodule Mix.Tasks.Aoc do
   defp tests(day) do
     case File.ls(tests_dir(day)) do
       {:ok, paths} ->
-        paths |> Enum.filter(&(not String.contains?(&1, "."))) |> Enum.sort
+        paths |> Enum.filter(&(not String.contains?(&1, "."))) |> Enum.sort()
 
       {:error, e} ->
         dbg(e)
@@ -119,22 +119,26 @@ defmodule Mix.Tasks.Aoc do
   defp run(day, ["test", "watch"]) do
     {:ok, pid} = Mix.Tasks.Aoc.Watcher.start_link({[dirs: ["lib/", "tests/day#{day}/"]], self()})
     Process.monitor(pid)
-    loop = fn (loop) ->
+
+    loop = fn loop ->
       IO.puts(IO.ANSI.clear() <> IO.ANSI.cursor(0, 0))
-      IO.puts "At #{DateTime.utc_now(:second)}:"
+      IO.puts("At #{DateTime.utc_now(:second)}:")
       System.shell("mix compile")
       :code.purge(module(day))
       :code.purge(Aoc2023.Common)
       :code.load_file(module(day))
       :code.load_file(Aoc2023.Common)
-      spawn fn ->
+
+      spawn(fn ->
         run(day, ["test"])
-      end
+      end)
+
       receive do
         :update -> loop.(loop)
         {:DOWN, _, :process, ^pid, _} -> nil
       end
     end
+
     loop.(loop)
   end
 
@@ -147,13 +151,21 @@ defmodule Mix.Tasks.Aoc do
     |> Enum.map(fn {test, input, p1e, p2e} ->
       parsed = mod.parse(input)
 
-      result = fn (part, got, expected) ->
+      result = fn part, got, expected ->
         cond do
           stringify(got) == expected ->
-            IO.puts(IO.ANSI.format [:green, "Test #{test}.#{part} succeeded (#{expected})"])
+            IO.puts(IO.ANSI.format([:green, "Test #{test}.#{part} succeeded (#{expected})"]))
+
           expected ->
-            IO.puts(IO.ANSI.format [:red, "Test #{test}.#{part} failed: expected #{expected}, got #{stringify(got)}"])
-          true ->  IO.puts("Test #{test}.#{part}: #{stringify(got)}")
+            IO.puts(
+              IO.ANSI.format([
+                :red,
+                "Test #{test}.#{part} failed: expected #{expected}, got #{stringify(got)}"
+              ])
+            )
+
+          true ->
+            IO.puts("Test #{test}.#{part}: #{stringify(got)}")
         end
       end
 
@@ -171,13 +183,24 @@ defmodule Mix.Tasks.Aoc do
     run(day, ["fetch"])
     mod = module(day)
     parsed = mod.parse(read("#{base_dir()}/inputs/day#{day}"))
-    val = case part do
-      "1" -> mod.part1(parsed)
-      "2" -> mod.part2(parsed)
-    end
+
+    val =
+      case part do
+        "1" -> mod.part1(parsed)
+        "2" -> mod.part2(parsed)
+      end
+
     HTTPoison.start()
-    resp = HTTPoison.post!("https://adventofcode.com/2023/day/#{day}/answer", {:form, [level: part, answer: stringify(val)]}, "user-agent": "aoc-ex by ben@soroos.net", cookie: "session=#{System.get_env("AOC_SESSION")}")
-    resp |> dbg
+
+    resp =
+      HTTPoison.post!(
+        "https://adventofcode.com/2023/day/#{day}/answer",
+        "level=#{part}&answer=#{stringify(val)}",
+        "user-agent": "aoc-ex by ben@soroos.net",
+        cookie: "session=#{System.get_env("AOC_SESSION")}",
+        "content-type": "application/x-www-form-urlencoded"
+      ).body
+    Regex.named_captures(~r[<main>(?<main>.*)</main>]is, resp)["main"] |> IO.puts
   end
 
   defp run(day, ["run", "-"]) do
@@ -204,7 +227,6 @@ defmodule Mix.Tasks.Aoc do
     module(day).main(if file, do: read(file), else: IO.read(:stdio, :eof))
   end
 
-
   defmodule Watcher do
     use GenServer
 
@@ -218,7 +240,10 @@ defmodule Mix.Tasks.Aoc do
       {:ok, %{watcher_pid: watcher_pid, callback: callback}}
     end
 
-    def handle_info({:file_event, watcher_pid, {_path, _events}}, %{watcher_pid: watcher_pid, callback: callback} = state) do
+    def handle_info(
+          {:file_event, watcher_pid, {_path, _events}},
+          %{watcher_pid: watcher_pid, callback: callback} = state
+        ) do
       send(callback, :update)
       {:noreply, state}
     end