diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5782e12..d2c7878 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,14 @@
-# Changelog for Cldr_Lists v2.8.0
+# Changelog
+
+## Cldr_Lists v2.9.0-rc.0
+
+This is the changelog for Cldr_lists v2.9.0-rc.0 released on October 3rd, 2021.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
+
+### Enhancements
+
+* Support [CLDR 40](http://cldr.unicode.org/index/downloads/cldr-40)
+
+## Cldr_Lists v2.8.0
 
 This is the changelog for Cldr_lists v2.8.0 released on April 8th, 2021.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -6,7 +16,7 @@ This is the changelog for Cldr_lists v2.8.0 released on April 8th, 2021.  For ol
 
 * Support [CLDR 39](http://cldr.unicode.org/index/downloads/cldr-39)
 
-# Changelog for Cldr_Lists v2.7.0
+## Cldr_Lists v2.7.0
 
 This is the changelog for Cldr_lists v2.7.0 released on November 1st, 2020.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -14,7 +24,7 @@ This is the changelog for Cldr_lists v2.7.0 released on November 1st, 2020.  For
 
 * Support [CLDR 38](http://cldr.unicode.org/index/downloads/cldr-38)
 
-# Changelog for Cldr_Lists v2.6.1
+## Cldr_Lists v2.6.1
 
 This is the changelog for Cldr_lists v2.6.1 released on September 26th, 2020.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -22,7 +32,7 @@ This is the changelog for Cldr_lists v2.6.1 released on September 26th, 2020.  F
 
 * Use `Cldr.default_backend!/0` instead of `Cldr.default_backend/0` if its available
 
-# Changelog for Cldr_Lists v2.6.0
+## Cldr_Lists v2.6.0
 
 This is the changelog for Cldr_lists v2.6.0 released on July 1st, 2020.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -34,7 +44,7 @@ This is the changelog for Cldr_lists v2.6.0 released on July 1st, 2020.  For old
 
 * Updates to use `Cldr.locale_and_backend_from/{1, 2}` which normalizes extraction of backend and locale from parameters and options. As a result, also bump the minimum version of `ex_cldr_numbers` to `2.15`
 
-# Changelog for Cldr_Lists v2.5.0
+## Cldr_Lists v2.5.0
 
 This is the changelog for Cldr_lists v2.5.0 released on May 4th, 2020.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -44,7 +54,7 @@ This is the changelog for Cldr_lists v2.5.0 released on May 4th, 2020.  For olde
 
 * Depends upon [ex_cldr_numbers versin 2.17](https://hex.pm/packages/ex_cldr_numbers/2.17.0) which encapsulates CLDR39 data.
 
-# Changelog for Cldr_Lists v2.4.0
+## Cldr_Lists v2.4.0
 
 This is the changelog for Cldr_lists v2.4.0 released on August 31st, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -54,7 +64,7 @@ This is the changelog for Cldr_lists v2.4.0 released on August 31st, 2019.  For
 
 * Rename `Cldr.List.list_pattern_styles_for/2` to `Cldr.List.list_styles_for/2`. `Cldr.List.list_pattern_styles_for/2` will still operate and delegates to `Cldr.List.list_styles_for/2`.  It is now deprecated and will be removed in `ex_cldr_lists` 3.0.
 
-# Changelog for Cldr_Lists v2.3.0
+## Cldr_Lists v2.3.0
 
 This is the changelog for Cldr_lists v2.3.0 released on August 29th, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -62,7 +72,7 @@ This is the changelog for Cldr_lists v2.3.0 released on August 29th, 2019.  For
 
 * Add `Cldr.List.known_list_styles/0`
 
-# Changelog for Cldr_Lists v2.2.2
+## Cldr_Lists v2.2.2
 
 This is the changelog for Cldr_lists v2.2.2 released on August 23rd, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -70,7 +80,7 @@ This is the changelog for Cldr_lists v2.2.2 released on August 23rd, 2019.  For
 
 * Fix `@spec` for `Cldr.List.to_string/3` and `Cldr.List.to_string!/3`
 
-# Changelog for Cldr_Lists v2.2.1
+## Cldr_Lists v2.2.1
 
 This is the changelog for Cldr_lists v2.2.1 released on August 21st, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -82,7 +92,7 @@ This is the changelog for Cldr_lists v2.2.1 released on August 21st, 2019.  For
 
 * Fix dialyzer warnings
 
-# Changelog for Cldr_Lists v2.2.0
+## Cldr_Lists v2.2.0
 
 This is the changelog for Cldr_lists v2.2.0 released on March 28th, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -90,7 +100,7 @@ This is the changelog for Cldr_lists v2.2.0 released on March 28th, 2019.  For o
 
 * Updates to [CLDR version 35.0.0](http://cldr.unicode.org/index/downloads/cldr-35) released on March 27th 2019.
 
-# Changelog for Cldr_Lists v2.1.0
+## Cldr_Lists v2.1.0
 
 This is the changelog for Cldr_lists v2.1.0 released on March 23rd, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -98,7 +108,7 @@ This is the changelog for Cldr_lists v2.1.0 released on March 23rd, 2019.  For o
 
 * Support `Cldr.default_backend/0` and apply it as the default for functions in `Cldr.List`
 
-# Changelog for Cldr_Lists v2.0.2
+## Cldr_Lists v2.0.2
 
 This is the changelog for Cldr_lists v2.0.2 released on March 20th, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -106,7 +116,7 @@ This is the changelog for Cldr_lists v2.0.2 released on March 20th, 2019.  For o
 
 * Fix dialyzer warnings
 
-# Changelog for Cldr_Lists v2.0.1
+## Cldr_Lists v2.0.1
 
 This is the changelog for Cldr_lists v2.0.1 released on March 15th, 2019.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
@@ -124,7 +134,7 @@ defmodule MyApp.Cldr do
 end
 ```
 
-# Changelog for Cldr_Lists v2.0.0
+## Cldr_Lists v2.0.0
 
 This is the changelog for Cldr_lists v2.0.0 released on November 24th, 2018.  For older changelogs please consult the release tag on [GitHub](https://github.com/kipcole9/cldr_lists/tags)
 
diff --git a/lib/cldr/list.ex b/lib/cldr/list.ex
index 09a337f..1dd091f 100644
--- a/lib/cldr/list.ex
+++ b/lib/cldr/list.ex
@@ -290,8 +290,9 @@ defmodule Cldr.List do
         :standard_short, :unit, :unit_narrow, :unit_short]
 
   """
+  @root_locale Cldr.Config.root_locale_name()
 
-  @known_list_formats Cldr.Config.get_locale("root", %Cldr.Config{locales: ["root"]})
+  @known_list_formats Cldr.Config.get_locale(@root_locale, %Cldr.Config{locales: [@root_locale]})
     |> Map.get(:list_formats) |> Map.keys
 
   def known_list_formats do
diff --git a/mix.exs b/mix.exs
index ccf371d..865d4f6 100644
--- a/mix.exs
+++ b/mix.exs
@@ -1,7 +1,7 @@
 defmodule Cldr.Lists.Mixfile do
   use Mix.Project
 
-  @version "2.9.0"
+  @version "2.9.0-rc.0"
 
   def project do
     [
@@ -30,18 +30,15 @@ defmodule Cldr.Lists.Mixfile do
     """
   end
 
-  # Run "mix help compile.app" to learn about applications.
   def application do
     [
       extra_applications: [:logger]
     ]
   end
 
-  # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
-      # {:ex_cldr_numbers, "~> 2.17"},
-      {:ex_cldr_numbers, path: "../cldr_numbers"},
+      {:ex_cldr_numbers, "~> 2.23-rc"},
       {:ex_doc, "~> 0.18", optional: true, runtime: false},
       {:jason, "~> 1.0", optional: true},
       {:dialyxir, "~> 1.0", only: [:dev], runtime: false}
diff --git a/mix.lock b/mix.lock
index 7e797a4..a2e7836 100644
--- a/mix.lock
+++ b/mix.lock
@@ -1,13 +1,13 @@
 %{
-  "cldr_utils": {:hex, :cldr_utils, "2.15.1", "1136987437ac4821f3ec7d46ff150f1c020a1f79730ff1252bfa7681ed577f31", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: true]}, {:certifi, "~> 2.5", [hex: :certifi, repo: "hexpm", optional: true]}, {:decimal, "~> 1.9 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm", "ca3c8da0aab18b4d944541392e9548422e30854e3a9d7768dc629c8123f8efb8"},
+  "cldr_utils": {:hex, :cldr_utils, "2.17.0-rc.0", "3356664647cfd47e47af22dfeb1a66f50309623588d50908bb775c1c1431f7cd", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: true]}, {:certifi, "~> 2.5", [hex: :certifi, repo: "hexpm", optional: true]}, {:decimal, "~> 1.9 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}], "hexpm", "ccff70d78c53019c4f980a39d5fec77bdd0f25895021834bc7a476a2741d523d"},
   "decimal": {:hex, :decimal, "2.0.0", "a78296e617b0f5dd4c6caf57c714431347912ffb1d0842e998e9792b5642d697", [:mix], [], "hexpm", "34666e9c55dea81013e77d9d87370fe6cb6291d1ef32f46a1600230b1d44f577"},
   "dialyxir": {:hex, :dialyxir, "1.1.0", "c5aab0d6e71e5522e77beff7ba9e08f8e02bad90dfbeffae60eaf0cb47e29488", [:mix], [{:erlex, ">= 0.2.6", [hex: :erlex, repo: "hexpm", optional: false]}], "hexpm", "07ea8e49c45f15264ebe6d5b93799d4dd56a44036cf42d0ad9c960bc266c0b9a"},
   "earmark": {:hex, :earmark, "1.4.7", "7b5f0474469688f5514948a4e0c42955a5690d165deaf19c8eb950a3443a40f3", [:mix], [], "hexpm", "0a55a49ee6fa8bc8678f894dfa8a882af6fe8deb65aed6856122226db5b0fe5b"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.15", "b29e8e729f4aa4a00436580dcc2c9c5c51890613457c193cc8525c388ccb2f06", [:mix], [], "hexpm", "044523d6438ea19c1b8ec877ec221b008661d3c27e3b848f4c879f500421ca5c"},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
-  "ex_cldr": {:hex, :ex_cldr, "2.20.0", "571a4b490c333809be59cc984a21be2deaab1db9e2418e323d5935aec8b1394a", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: true]}, {:certifi, "~> 2.5", [hex: :certifi, repo: "hexpm", optional: true]}, {:cldr_utils, "~> 2.15", [hex: :cldr_utils, repo: "hexpm", optional: false]}, {:decimal, "~> 1.6 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:gettext, "~> 0.13", [hex: :gettext, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:nimble_parsec, "~> 0.5 or ~> 1.0", [hex: :nimble_parsec, repo: "hexpm", optional: false]}, {:plug, "~> 1.9", [hex: :plug, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.0", [hex: :telemetry, repo: "hexpm", optional: true]}], "hexpm", "06147e4a27be62e6fe92db14cf5048c645927bfc530aa1cc6af8c92d65e32427"},
-  "ex_cldr_currencies": {:hex, :ex_cldr_currencies, "2.11.1", "a6e56209d6f98082cd197aa424333e7a0e38e79253fce9589117719728de4fef", [:mix], [{:ex_cldr, "~> 2.23", [hex: :ex_cldr, repo: "hexpm", optional: false]}, {:ex_doc, "~> 0.18", [hex: :ex_doc, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm", "99e8eb3f48a30127bb11ab70f484c124c9fe5b11bce710c94c53939032b0c58c"},
-  "ex_cldr_numbers": {:hex, :ex_cldr_numbers, "2.17.0", "e79d4161ca82ce8d40bec5bb7dc83d457e81d03e39042e5b62ff48b2cc3c35f3", [:mix], [{:decimal, "~> 1.6 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:ex_cldr, "~> 2.20", [hex: :ex_cldr, repo: "hexpm", optional: false]}, {:ex_cldr_currencies, "~> 2.9", [hex: :ex_cldr_currencies, repo: "hexpm", optional: false]}, {:ex_doc, "~> 0.18", [hex: :ex_doc, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm", "c6b7ee62e97cefc6d3c47896608f8152cc65ea40238ea99cd92c6f04acdd1627"},
+  "ex_cldr": {:hex, :ex_cldr, "2.24.0-rc.0", "878edd979cd1047273e2b84a12eca42546eefb1e3c1dce67019ee9a48cd5df4a", [:mix], [{:castore, "~> 0.1", [hex: :castore, repo: "hexpm", optional: true]}, {:certifi, "~> 2.5", [hex: :certifi, repo: "hexpm", optional: true]}, {:cldr_utils, "~> 2.17-rc", [hex: :cldr_utils, repo: "hexpm", optional: false]}, {:decimal, "~> 1.6 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:gettext, "~> 0.13", [hex: :gettext, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:nimble_parsec, "~> 0.5 or ~> 1.0", [hex: :nimble_parsec, repo: "hexpm", optional: true]}, {:plug, "~> 1.9", [hex: :plug, repo: "hexpm", optional: true]}], "hexpm", "ef0bf0f461a15c51f267e08bf6dea9b66c2f0aa1d0ade195c6fa1995794eb70c"},
+  "ex_cldr_currencies": {:hex, :ex_cldr_currencies, "2.12.0-rc.0", "2e8fa788282140916d4034b1cfdf6b290e4394301b5637506976fa2baa9889e9", [:mix], [{:ex_cldr, "~> 2.24-rc", [hex: :ex_cldr, repo: "hexpm", optional: false]}, {:ex_doc, "~> 0.18", [hex: :ex_doc, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm", "ef8fb5e228b324ddef95b180e5b385554ae58da9d2ebbaf39b38872476755f22"},
+  "ex_cldr_numbers": {:hex, :ex_cldr_numbers, "2.23.0-rc.0", "53835775c7cb22432330adee6186fac7f6c906eb1b90e27ebfee7fe2948f4083", [:mix], [{:decimal, "~> 1.6 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:ex_cldr, "~> 2.24-rc", [hex: :ex_cldr, repo: "hexpm", optional: false]}, {:ex_cldr_currencies, "~> 2.12-rc", [hex: :ex_cldr_currencies, repo: "hexpm", optional: false]}, {:ex_doc, "~> 0.18", [hex: :ex_doc, repo: "hexpm", optional: true]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}], "hexpm", "d957a92c1578eb72193242333c04b581d481f5f4aab8c7dc30f55c63db5aa390"},
   "ex_doc": {:hex, :ex_doc, "0.25.3", "3edf6a0d70a39d2eafde030b8895501b1c93692effcbd21347296c18e47618ce", [:mix], [{:earmark_parser, "~> 1.4.0", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "9ebebc2169ec732a38e9e779fd0418c9189b3ca93f4a676c961be6c1527913f5"},
   "jason": {:hex, :jason, "1.2.2", "ba43e3f2709fd1aa1dce90aaabfd039d000469c05c56f0b8e31978e03fa39052", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "18a228f5f0058ee183f29f9eae0805c6e59d61c3b006760668d8d18ff0d12179"},
   "makeup": {:hex, :makeup, "1.0.5", "d5a830bc42c9800ce07dd97fa94669dfb93d3bf5fcf6ea7a0c67b2e0e4a7f26c", [:mix], [{:nimble_parsec, "~> 0.5 or ~> 1.0", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "cfa158c02d3f5c0c665d0af11512fed3fba0144cf1aadee0f2ce17747fba2ca9"},