diff --git a/README.md b/README.md
index b9175e7..2c3fa05 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ Language](SCHEMA-SPEC.md) loosely based on JSON Schema.
 The language is based on [SDLang](https://sdlang.org), with a number of
 modifications and clarifications on its syntax and behavior.
 
-The current version of the KDL spec is `2.0.0-draft.3`.
+The current version of the KDL spec is `2.0.0-draft.4`.
 
 [Play with it in your browser!](https://kdl-play.danini.dev/)
 
diff --git a/SPEC.md b/SPEC.md
index 8bb96b8..627e473 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -3,8 +3,8 @@
 This is the semi-formal specification for KDL, including the intended data
 model and the grammar.
 
-This document describes KDL version `2.0.0-draft.3`. It was released on
-2024-02-07.
+This document describes KDL version `2.0.0-draft.4`. It was released on
+2024-02-12.
 
 ## Introduction