diff --git a/README.md b/README.md
index 9db2e3dc..9a8b8178 100644
--- a/README.md
+++ b/README.md
@@ -229,7 +229,10 @@ args/kwargs, `class << self` (singleton class), masgn to any target
 (ivar/cvar/gvar/attr/index/constant + nested destructuring), `alias`/`undef`,
 anonymous params + forwarding (`def f(*, **, &)` / `g(...)`), special globals
 (`$$` etc.), shorthand hash `{x:}`, quoted / operator / char-literal symbols,
-rationals & imaginaries (`2r` / `3i`), unicode identifiers, `for…in…end` loops,
+rationals & imaginaries (`2r` / `3i`), unicode identifiers — including the case
+rule that makes `Ἅbb` a **constant** and `μm` a local, titlecase letters
+counting as uppercase and caseless ones (CJK, Hebrew, Arabic) as lowercase —
+`for…in…end` loops,
 block keyword params, begin-less rescue/ensure, and `!~` — on top of the
 pre-existing core (full object model, metaprogramming, Fiber/Thread, Marshal,
 regexp, the scientific bindings, and the js/wasm target) detailed below.
diff --git a/go.mod b/go.mod
index 13d944ec..154188f3 100644
--- a/go.mod
+++ b/go.mod
@@ -132,7 +132,7 @@ require (
 	github.com/go-ruby-pagy/pagy v0.0.0-20261025191701-053fcd4aa5cc
 	github.com/go-ruby-paper-trail/paper-trail v0.0.0-20261025191706-ca25fcaea25a
 	github.com/go-ruby-parquet/parquet v0.0.0-20261025191711-6e7a95f7a303
-	github.com/go-ruby-parser/parser v0.13.1
+	github.com/go-ruby-parser/parser v0.14.0
 	github.com/go-ruby-pathname/pathname v0.0.0-20261025180827-dbeb0072806a
 	github.com/go-ruby-pg/pg v0.0.0-20261025191721-f5e310f52c5f
 	github.com/go-ruby-prawn/prawn v0.0.0-20261028113423-d440480b5471
diff --git a/go.sum b/go.sum
index 1efc3a25..7a5883a6 100644
--- a/go.sum
+++ b/go.sum
@@ -539,8 +539,8 @@ github.com/go-ruby-paper-trail/paper-trail v0.0.0-20261025191706-ca25fcaea25a h1
 github.com/go-ruby-paper-trail/paper-trail v0.0.0-20261025191706-ca25fcaea25a/go.mod h1:tDd8O+gDluzM96A0+akb2HwbPVH87uyD6F45m92vXnI=
 github.com/go-ruby-parquet/parquet v0.0.0-20261025191711-6e7a95f7a303 h1:7yRjNEDoHtJdLRGdBhbjlevFSOVgGAu19xcb7a+mV8E=
 github.com/go-ruby-parquet/parquet v0.0.0-20261025191711-6e7a95f7a303/go.mod h1:nBsEK7/8bOQ6rPfHgx8hYZDDrBsPF2B4iYp6QCYZGcA=
-github.com/go-ruby-parser/parser v0.13.1 h1:gq7QVT7KdRp7nZt1UHsa73YDo77qrD8kGdQY/GVEA6g=
-github.com/go-ruby-parser/parser v0.13.1/go.mod h1:Se+ZvnD/4Vm0RRe1U5kZi0GmPSvSczJJXdZLiB0PlJY=
+github.com/go-ruby-parser/parser v0.14.0 h1:eMEtoInHh/5Yr8wTeUaTbYYw5G3S5IesaW8/gMwsEhQ=
+github.com/go-ruby-parser/parser v0.14.0/go.mod h1:Se+ZvnD/4Vm0RRe1U5kZi0GmPSvSczJJXdZLiB0PlJY=
 github.com/go-ruby-pathname/pathname v0.0.0-20261025180827-dbeb0072806a h1:RSaroQC+fQU6UMnu/g3X9KwADDiHvSBJk2EtofDseqg=
 github.com/go-ruby-pathname/pathname v0.0.0-20261025180827-dbeb0072806a/go.mod h1:tc53WqrwBXWit/O/QmeTZuhm9sz+0IYhzvxjM+BiPa4=
 github.com/go-ruby-pg/pg v0.0.0-20261025191721-f5e310f52c5f h1:Jq3MUeHmFftrPQHEF7GiRjKpSr+g9CdruR/CNDklID8=