diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8099570..49e5ef3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.1.5 - 2026-06-15
+
+- Loosen the `elixir:` requirement from `~> 1.20` to `~> 1.16` so downstream projects on Elixir 1.16–1.19 can resolve `json_codec`. The codec macros and generated code do not use 1.20+ features.
+
 ## 0.1.4 - 2026-06-13
 
 - Fix `defstruct` literal defaults so values like `%{}` remain runtime values instead of escaped AST.
diff --git a/mix.exs b/mix.exs
index cecca45..175d247 100644
--- a/mix.exs
+++ b/mix.exs
@@ -4,8 +4,8 @@ defmodule JSONCodec.MixProject do
   def project do
     [
       app: :json_codec,
-      version: "0.1.4",
-      elixir: "~> 1.20",
+      version: "0.1.5",
+      elixir: "~> 1.16",
       start_permanent: Mix.env() == :prod,
       description: "Compile-time generated codecs for JSON-shaped Elixir structs",
       package: package(),