diff --git a/buildbox.cabal b/buildbox.cabal
--- a/buildbox.cabal
+++ b/buildbox.cabal
@@ -1,5 +1,5 @@
 Name:                buildbox
-Version:             1.2.0.0
+Version:             1.2.1.0
 License:             BSD3
 License-file:        LICENSE
 Author:              Ben Lippmeier
@@ -24,16 +24,16 @@
 
 Library
   Build-Depends: 
-        base                 == 4.*,
-        time                 == 1.1.*,
-        mtl                  == 1.1.*,
-        directory            == 1.0.*,
-        process              == 1.0.*,
-        random               == 1.0.*,
-        pretty               == 1.0.*,
-        old-locale           == 1.0.*,
-        containers           == 0.3.*,
-        bytestring           == 0.9.*
+        base           == 4.*,
+        time           >= 1.1    && <= 1.3,
+        mtl            == 1.1.*,
+        directory      >= 1.0    && <= 1.2,
+        process        == 1.0.*,
+        random         == 1.0.*,
+        pretty         == 1.0.*,
+        old-locale     == 1.0.*,
+        containers     == 0.3.*,
+        bytestring     == 0.9.*
 
   ghc-options:
         -Wall