diff --git a/.tool-versions b/.tool-versions
index ffcf012..c71d357 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-elixir 1.8.2
+elixir 1.9.0
diff --git a/Dockerfile b/Dockerfile
index a4e3964..2eb743c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM bitwalker/alpine-elixir:1.8.2 as builder
+FROM bitwalker/alpine-elixir:1.9.0 as builder
 
 MAINTAINER admin@binarytemple.co.uk
 
@@ -28,7 +28,7 @@ COPY rel rel/
 
 RUN mix do distillery.release
 
-FROM bitwalker/alpine-elixir:1.8.2 
+FROM bitwalker/alpine-elixir:1.9.0
 
 COPY --from=builder /otp/app/_build/prod/rel/elixir_plug_poc/releases/*/elixir_plug_poc.tar.gz /opt/app/
 
diff --git a/mix.exs b/mix.exs
index 8bbc733..5397511 100644
--- a/mix.exs
+++ b/mix.exs
@@ -37,7 +37,7 @@ defmodule ElixirPlugPoc.Mixfile do
     [
       {:plug_cowboy, "~> 2.1.0"},
       {:httpoison, "~> 1.5.1"},
-      {:distillery, "~> 2.1"},
+      {:distillery, "~> 2.1.1"},
       {:timex, "~> 3.6.1 "},
     ]
   end
diff --git a/mix.lock b/mix.lock
index 1db2f67..09f834d 100644
--- a/mix.lock
+++ b/mix.lock
@@ -4,7 +4,7 @@
   "combine": {:hex, :combine, "0.10.0", "eff8224eeb56498a2af13011d142c5e7997a80c8f5b97c499f84c841032e429f", [:mix], [], "hexpm"},
   "cowboy": {:hex, :cowboy, "2.6.3", "99aa50e94e685557cad82e704457336a453d4abcb77839ad22dbe71f311fcc06", [:rebar3], [{:cowlib, "~> 2.7.3", [hex: :cowlib, repo: "hexpm", optional: false]}, {:ranch, "~> 1.7.1", [hex: :ranch, repo: "hexpm", optional: false]}], "hexpm"},
   "cowlib": {:hex, :cowlib, "2.7.3", "a7ffcd0917e6d50b4d5fb28e9e2085a0ceb3c97dea310505f7460ff5ed764ce9", [:rebar3], [], "hexpm"},
-  "distillery": {:hex, :distillery, "2.1.0", "5f31c7771923c12dbb79dcd8d01c5913b07222f134c327e7ab026acdabae985b", [:mix], [{:artificery, "~> 0.2", [hex: :artificery, repo: "hexpm", optional: false]}], "hexpm"},
+  "distillery": {:hex, :distillery, "2.1.1", "f9332afc2eec8a1a2b86f22429e068ef35f84a93ea1718265e740d90dd367814", [:mix], [{:artificery, "~> 0.2", [hex: :artificery, repo: "hexpm", optional: false]}], "hexpm"},
   "gettext": {:hex, :gettext, "0.17.0", "abe21542c831887a2b16f4c94556db9c421ab301aee417b7c4fbde7fbdbe01ec", [:mix], [], "hexpm"},
   "hackney": {:hex, :hackney, "1.15.1", "9f8f471c844b8ce395f7b6d8398139e26ddca9ebc171a8b91342ee15a19963f4", [:rebar3], [{:certifi, "2.5.1", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "6.0.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "1.0.1", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "1.1.4", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}], "hexpm"},
   "httpoison": {:hex, :httpoison, "1.5.1", "0f55b5b673b03c5c327dac7015a67cb571b99b631acc0bc1b0b98dcd6b9f2104", [:mix], [{:hackney, "~> 1.8", [hex: :hackney, repo: "hexpm", optional: false]}], "hexpm"},