diff --git a/.tool-versions b/.tool-versions
index 2eb06b4..e772dd0 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,4 +1,4 @@
-elixir 1.11.3
+elixir 1.13.3
 python 3.9.1
 nodejs 16.14.0
-erlang 23.2.3
+erlang 24.2.1
diff --git a/elixir_buildpack.config b/elixir_buildpack.config
index 1a8e255..e87fdbc 100644
--- a/elixir_buildpack.config
+++ b/elixir_buildpack.config
@@ -1,5 +1,5 @@
 # Erlang version
-erlang_version=23.2.3
+erlang_version=24.2.1
 
 # Elixir version
-elixir_version=1.11.3
+elixir_version=1.13.3
diff --git a/mix.exs b/mix.exs
index 265027e..4f98baf 100644
--- a/mix.exs
+++ b/mix.exs
@@ -5,7 +5,7 @@ defmodule Chess.Mixfile do
     [
       app: :chess,
       version: "0.2.0",
-      elixir: "~> 1.11.3",
+      elixir: "~> 1.13.3",
       elixirc_paths: elixirc_paths(Mix.env()),
       compilers: [:phoenix, :gettext] ++ Mix.compilers(),
       build_embedded: Mix.env() == :prod,