diff --git a/info.rkt b/info.rkt
index 522d989..1ba814e 100644
--- a/info.rkt
+++ b/info.rkt
@@ -12,7 +12,7 @@
   )
 
 (define deps
-  '("base" "gregor"))
+  '("base" "gregor" "tzinfo"))
 
 (define build-deps
   '("racket-doc"