diff --git a/changelog b/changelog
index 796cf314521ad7c5dbc9c1d9d6e33cd0975d4c7c..e2b3a697fc3f1819b43ab62b47ce8d34cbba54c7 100644
--- a/changelog
+++ b/changelog
@@ -1,5 +1,11 @@
 -*-change-log-*-
 
+0.5.5.0 Ross Paterson <R.Paterson@city.ac.uk> Oct 2017
+	* Added mapSelect and mapSelectT
+	* Renamed selectToCont to selectToContT for consistency
+	* Defined explicit method definitions to fix space leaks
+	* Added missing Semigroup instance to `Constant` functor
+
 0.5.4.0 Ross Paterson <R.Paterson@city.ac.uk> Feb 2017
 	* Migrate Bifoldable and Bitraversable instances for Constant
 
diff --git a/transformers.cabal b/transformers.cabal
index 75d26163ebeab59e88d7044fad77dc51b26f4bf4..8583b12c6c3198f9e14c5b323e7269bc6234bc3f 100644
--- a/transformers.cabal
+++ b/transformers.cabal
@@ -1,5 +1,5 @@
 name:         transformers
-version:      0.5.4.0
+version:      0.5.5.0
 license:      BSD3
 license-file: LICENSE
 author:       Andy Gill, Ross Paterson