diff --git a/CHANGELOG.md b/CHANGELOG.md
index 944fcb2..51d40ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 ## v0.5.0 (2026-08-02)
 
-  * Breaking change: `client_id` and `redirect_uri` are replaced with `client_id_path`, `redirect_uri_path`, and `base_url_fun`, with the latter dynamically building the base URL, eg `fn -> MyAppWeb.Endpoint.url() end`.
+  * Breaking change: `client_id` and `redirect_uri` are replaced with `client_id_path`, `redirect_uri_path`, and `base_url_fun`, with the latter dynamically building the base URL, eg `&MyAppWeb.Endpoint.url/0`.
 
 ## v0.4.0 (2026-08-01)
 
diff --git a/README.md b/README.md
index 0c16d02..27fcd3b 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ Add `Latch` to your supervision tree, giving it a unique name and a `Latch.Store
         client_id_path: "/oauth-client-metadata.json",
         redirect_uri_path: "/auth/callback",
         # Dynamically resolve the base URL at runtime, or pass a hard-coded URL
-        base_url_fun: fn -> MyApp.Endpoint.url() end,
+        base_url_fun: &MyApp.Endpoint.url/0,
         scope: "atproto",
         signing_key: System.fetch_env!("ATPROTO_CLIENT_PRIVATE_JWK")}
     ]