diff --git a/mix.exs b/mix.exs
index 2a6dfc9..59a1ef4 100644
--- a/mix.exs
+++ b/mix.exs
@@ -40,7 +40,7 @@ defmodule Alice.Mixfile do
   defp deps do
     [
       {:slack, "~> 0.23.2"},
-      {:poison, "~> 4.0"},
+      {:poison, "~> 5.0"},
       {:poolboy, "~> 1.5.0"},
       {:redix, "~> 0.6.0"},
 
diff --git a/mix.lock b/mix.lock
index 6c2ddcc..7df331c 100644
--- a/mix.lock
+++ b/mix.lock
@@ -18,7 +18,7 @@
   "mimerl": {:hex, :mimerl, "1.2.0", "67e2d3f571088d5cfd3e550c383094b47159f3eee8ffa08e64106cdf5e981be3", [:rebar3], [], "hexpm", "f278585650aa581986264638ebf698f8bb19df297f66ad91b18910dfc6e19323"},
   "nimble_parsec": {:hex, :nimble_parsec, "0.5.3", "def21c10a9ed70ce22754fdeea0810dafd53c2db3219a0cd54cf5526377af1c6", [:mix], [], "hexpm", "589b5af56f4afca65217a1f3eb3fee7e79b09c40c742fddc1c312b3ac0b3399f"},
   "parse_trans": {:hex, :parse_trans, "3.3.0", "09765507a3c7590a784615cfd421d101aec25098d50b89d7aa1d66646bc571c1", [:rebar3], [], "hexpm", "17ef63abde837ad30680ea7f857dd9e7ced9476cdd7b0394432af4bfc241b960"},
-  "poison": {:hex, :poison, "4.0.1", "bcb755a16fac91cad79bfe9fc3585bb07b9331e50cfe3420a24bcc2d735709ae", [:mix], [], "hexpm", "ba8836feea4b394bb718a161fc59a288fe0109b5006d6bdf97b6badfcf6f0f25"},
+  "poison": {:hex, :poison, "5.0.0", "d2b54589ab4157bbb82ec2050757779bfed724463a544b6e20d79855a9e43b24", [:mix], [{:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "11dc6117c501b80c62a7594f941d043982a1bd05a1184280c0d9166eb4d8d3fc"},
   "poolboy": {:hex, :poolboy, "1.5.2", "392b007a1693a64540cead79830443abf5762f5d30cf50bc95cb2c1aaafa006b", [:rebar3], [], "hexpm", "dad79704ce5440f3d5a3681c8590b9dc25d1a561e8f5a9c995281012860901e3"},
   "redix": {:hex, :redix, "0.6.1", "20986b0e02f02b13e6f53c79a1ae70aa83147488c408f40275ec261f5bb0a6d0", [:mix], [{:connection, "~> 1.0", [hex: :connection, repo: "hexpm", optional: false]}], "hexpm", "aa171cc3827c69948269a37449e728cc5b803f6c9f86dcb3bff5a8a7b2274cef"},
   "slack": {:hex, :slack, "0.23.2", "47c7534018aa9687de684cc77c2bf7060bf8b283814b1015e2c910d15a106eeb", [:mix], [{:httpoison, "~> 1.2", [hex: :httpoison, repo: "hexpm", optional: false]}, {:jason, "~> 1.1", [hex: :jason, repo: "hexpm", optional: false]}, {:websocket_client, "~> 1.2.4", [hex: :websocket_client, repo: "hexpm", optional: false]}], "hexpm", "e8be5fe788c587c3d6faf1255f30bacd011075e75f444e0497d318321f0bac24"},