diff --git a/wai.cabal b/wai.cabal
--- a/wai.cabal
+++ b/wai.cabal
@@ -1,5 +1,5 @@
 Name:                wai
-Version:             0.4.2
+Version:             0.4.3
 Synopsis:            Web Application Interface.
 Description:         Provides a common protocol for communication between web applications and web servers.
 License:             BSD3
@@ -17,13 +17,13 @@
     location:        git://github.com/yesodweb/wai.git
 
 Library
-  Build-Depends:     base                   >= 3        && < 5
-                   , bytestring             >= 0.9      && < 0.10
-                   , blaze-builder          >= 0.2      && < 0.4
-                   , enumerator             >= 0.4.8    && < 0.5
-                   , network                >= 2.2      && < 2.4
-                   , http-types             >= 0.6      && < 0.7
-                   , text                   >= 0.5      && < 1.0
-                   , transformers           >= 0.2      && < 0.3
+  Build-Depends:     base                      >= 4        && < 5
+                   , bytestring                >= 0.9.1.4  && < 0.10
+                   , blaze-builder             >= 0.2.1.4  && < 0.4
+                   , enumerator                >= 0.4.8    && < 0.5
+                   , network                   >= 2.2.1.5  && < 2.4
+                   , http-types                >= 0.6      && < 0.7
+                   , text                      >= 0.7      && < 0.12
+                   , transformers              >= 0.2.2    && < 0.3
   Exposed-modules:   Network.Wai
   ghc-options:       -Wall