diff --git a/pipes-postgresql-simple.cabal b/pipes-postgresql-simple.cabal
--- a/pipes-postgresql-simple.cabal
+++ b/pipes-postgresql-simple.cabal
@@ -1,5 +1,5 @@
 name: pipes-postgresql-simple
-version: 0.1.1.1
+version: 0.1.1.2
 synopsis: Convert various postgresql-simple calls to work with pipes
 description: This library provides a few Producers and Consumers that allow
   @postgresql-simple@ calls to be made within the @pipes@ framework. Currently,
@@ -30,7 +30,7 @@
                        mtl               >=2.1       ,
                        bytestring        >=0.9       ,
                        text              >=0.11      ,
-                       pipes             >=3.3       ,
+                       pipes             >=4.0       ,
                        pipes-safe                    ,
                        postgresql-simple >=0.3.4     ,
                        pipes-concurrency >=1.1       ,