diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,3 +1,7 @@
+0.5.3
+
+* Update `transformers` dependency to work with GHC8.
+
 0.5.2
 
 * Remove LANGUAGE Safe because won't build against lens-4.13 or higher otherwise.
diff --git a/validation.cabal b/validation.cabal
--- a/validation.cabal
+++ b/validation.cabal
@@ -1,5 +1,5 @@
 name:               validation
-version:            0.5.2
+version:            0.5.3
 license:            BSD3
 license-file:       LICENSE
 author:             Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ> <dibblego>, Nick Partridge <nkpart>
@@ -87,7 +87,7 @@
                     , semigroupoids >= 4.0
                     , bifunctors    >= 3.0
                     , lens          >= 4.0 && < 5
-                    , transformers  >= 0.3 && < 0.5
+                    , transformers  >= 0.3 && < 0.6
 
   ghc-options:
                     -Wall