diff --git a/css/recognizer.rkt b/css/recognizer.rkt
index de7d3e8d..383d3839 100644
--- a/css/recognizer.rkt
+++ b/css/recognizer.rkt
@@ -4,7 +4,6 @@
 ;;; WARNING: Notations are not following the CSS Specifications https://drafts.csswg.org/css-values/#component-combinators
 
 (provide (all-defined-out))
-(provide (rename-out [exact-nonnegative-integer? natural?]))
 
 (require "digitama/syntax/misc.rkt")
 (require "digitama/syntax/digicore.rkt")
diff --git a/info.rkt b/info.rkt
index 7906ad74..c704a111 100644
--- a/info.rkt
+++ b/info.rkt
@@ -5,6 +5,6 @@
 (define pkg-authors '(wargrey))
 
 (define version "1.0")
-(define deps '("base" "images-lib" "math-lib" "draw-lib" "typed-racket-lib" "typed-racket-more"))
+(define deps '(("base" #:version "6.8.0.2") "images-lib" "math-lib" "draw-lib" "typed-racket-lib" "typed-racket-more"))
 (define build-deps '("scribble-lib" "racket-doc"))