diff --git a/.tool-versions b/.tool-versions
index 8fcffe2..064efba 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,3 +1,3 @@
-erlang 26.1.2
-elixir 1.15.7
+erlang 24.3.4
+elixir 1.12.3
 nodejs 20.9.0
diff --git a/mix.exs b/mix.exs
index fc0d7b3..6aab2bb 100644
--- a/mix.exs
+++ b/mix.exs
@@ -8,7 +8,7 @@ defmodule Nodelix.MixProject do
     [
       app: :nodelix,
       version: @version,
-      elixir: "~> 1.15",
+      elixir: "~> 1.12.3 or ~> 1.13",
       start_permanent: Mix.env() == :prod,
       deps: deps(),
       description: description(),