diff --git a/buildbox.cabal b/buildbox.cabal
--- a/buildbox.cabal
+++ b/buildbox.cabal
@@ -1,5 +1,5 @@
 Name:                buildbox
-Version:             2.1.2.1
+Version:             2.1.2.2
 License:             BSD3
 License-file:        LICENSE
 Author:              Ben Lippmeier
@@ -21,10 +21,11 @@
 
 Library
   Build-Depends: 
-        base           == 4.6.*,
-        containers     == 0.5.*,
-        time           == 1.4.*,
-        directory      == 1.2.*,
+        base           >= 4.4 && < 4.7,
+        containers     >= 0.4 && < 0.6,
+        time           >= 1.2 && < 1.5,
+        directory      >= 1.1 && < 1.3,
+        bytestring     >= 0.9 && < 0.11,
         mtl            == 2.1.*,
         old-locale     == 1.0.*,
         process        == 1.1.*,