diff --git a/doc/advanced/route_validation.md b/doc/advanced/route_validation.md
index 90a84222..167bf526 100644
--- a/doc/advanced/route_validation.md
+++ b/doc/advanced/route_validation.md
@@ -2,11 +2,7 @@
 
 Namespace `reitit.spec` contains [clojure.spec](https://clojure.org/about/spec) definitions for raw-routes, routes, router and router options.
 
-**NOTE:** Use of specs requires to use one of the following:
-
-* `[org.clojure/clojurescript "1.9.660"]` (or higher)
-* `[org.clojure/clojure "1.9.0-RC1"]` (or higher)
-* `[clojure-future-spec "1.9.0-alpha17"]` (if Clojure 1.8 is used)
+**NOTE:** Use of specs requires to use Clojure 1.9.0 or higher.
 
 ## Example