diff --git a/nixos/doc/manual/release-notes/rl-2505.section.md b/nixos/doc/manual/release-notes/rl-2505.section.md
index 1fdaef9cc7d2..19627beb972a 100644
--- a/nixos/doc/manual/release-notes/rl-2505.section.md
+++ b/nixos/doc/manual/release-notes/rl-2505.section.md
@@ -20,6 +20,8 @@
 
 - The default Erlang OTP version has been updated to 27.
 
+- The default Elixir version has been updated to 1.18.
+
 - `nixos-rebuild-ng`, a full rewrite of `nixos-rebuild` in Python, is available for testing. You can enable it by setting [system.rebuild.enableNg](options.html#opt-system.rebuild.enableNg) in your configuration (this will replace the old `nixos-rebuild`), or by adding `nixos-rebuild-ng` to your `environment.systemPackages` (in this case, it will live side-by-side with `nixos-rebuild` as `nixos-rebuild-ng`). It is expected that the next major version of NixOS (25.11) will enable `system.rebuild.enableNg` by default.
 - A `nixos-rebuild build-image` sub-command has been added.
 
diff --git a/pkgs/development/beam-modules/default.nix b/pkgs/development/beam-modules/default.nix
index e8e7d9edceaa..fb12ebd58154 100644
--- a/pkgs/development/beam-modules/default.nix
+++ b/pkgs/development/beam-modules/default.nix
@@ -43,7 +43,7 @@ let
       elvis-erlang = callPackage ./elvis-erlang { };
 
       # BEAM-based languages.
-      elixir = elixir_1_17;
+      elixir = elixir_1_18;
 
       elixir_1_18 = lib'.callElixir ../interpreters/elixir/1.18.nix {
         inherit erlang;