diff --git a/dates.cabal b/dates.cabal
--- a/dates.cabal
+++ b/dates.cabal
@@ -1,5 +1,5 @@
 name:                dates
-version:             0.2.2.0
+version:             0.2.2.1
 synopsis:            Small library for parsing different dates formats.
 description:         This package allows to parse many different formats
                      of dates. Both absolute and relative dates are supported.
@@ -45,7 +45,7 @@
                        base-unicode-symbols ==0.2.*,
                        time >= 1.4,
                        parsec >=3.1,
-                       syb ==0.3.*
+                       syb >=0.3.7
 
   GHC-Options:         -O2