diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3f24e9f49..837e9fefe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## v0.12.0-dev
+## v0.12.0 (2016-05-15)
 
 * Enhancements
   * Add package checksums to lock, ensuring a locked package can not change it's content
diff --git a/mix.exs b/mix.exs
index f3e8a0d50..853d454ac 100644
--- a/mix.exs
+++ b/mix.exs
@@ -3,7 +3,7 @@ defmodule Hex.Mixfile do
 
   def project do
     [app: :hex,
-     version: "0.12.0-dev",
+     version: "0.12.0",
      elixir: "~> 1.0",
      aliases: aliases,
      deps: deps,
diff --git a/release.sh b/release.sh
index 43d9a35f7..3e2db4a20 100755
--- a/release.sh
+++ b/release.sh
@@ -7,10 +7,10 @@ function join { local IFS="$1"; shift; echo "$*"; }
 # $3 = elixir version
 # $4 = saved elixir version
 function build {
-  rm erln8.config || true
+  rm .tool_versions || true
   rm -rf _build || true
 
-  echo -e "[Config]\nErlang=${2}\nElixir=v${3}" > erln8.config
+  echo -e "erlang ${2}\nelixir ${3}" > .tool_versions
 
   MIX_ENV=prod mix compile
 
@@ -62,13 +62,13 @@ function upload {
 # UPDATE THIS FOR EVERY RELEASE
 hex_version=$1
 
-build ${hex_version} 18.3.1   1.2.4 1.2.0
-build ${hex_version} 17.5.6.8 1.1.1 1.1.0
-build ${hex_version} 17.5.6.8 1.0.5 1.0.0
+build ${hex_version} 18.3.3   1.2.5 1.2.0
+build ${hex_version} 17.5.6.9 1.1.1 1.1.0
+build ${hex_version} 17.5.6.9 1.0.5 1.0.0
 
 hex_csv ${hex_version} 1.0.0 1.1.0 1.2.0
 upload  ${hex_version} 1.0.0 1.1.0 1.2.0
 
 
 rm -rf _build
-rm -rf erln8.config
+rm -rf .tool_versions