diff --git a/CHANGES b/CHANGES
--- a/CHANGES
+++ b/CHANGES
@@ -1,5 +1,9 @@
 API-ish changes in hledger-lib. For user-visible changes, see the hledger changelog.
 
+0.23.3 (2014/9/12)
+
+- allow transformers 0.4*
+
 0.23.2 (2014/5/8)
 
 - postingsReport: also fix date sorting of displayed postings (#184)
diff --git a/hledger-lib.cabal b/hledger-lib.cabal
--- a/hledger-lib.cabal
+++ b/hledger-lib.cabal
@@ -1,5 +1,5 @@
 name:           hledger-lib
-version: 0.23.2
+version: 0.23.3
 stability:      stable
 category:       Finance, Console
 synopsis:       Core data types, parsers and utilities for the hledger accounting tool.
@@ -83,7 +83,7 @@
                  ,safe >= 0.2
                  ,split >= 0.1 && < 0.3
                  ,time
-                 ,transformers >= 0.2 && < 0.4
+                 ,transformers >= 0.2 && < 0.5
                  ,utf8-string >= 0.3.5 && < 0.4
                  ,HUnit
   if impl(ghc >= 7.4)