diff --git a/CHANGELOG.md b/CHANGELOG.md
index f18ecaa9..5f34c4f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 **0.6.0.5** -- Maintenance release
 
 * Bump `async` dependency to allow 2.1
+* Bump `transformers` dependency to allow 0.5
 
 **0.6.0.4** -- Maintenance release.
 
diff --git a/threepenny-gui.cabal b/threepenny-gui.cabal
index 73b97d4b..337f65ba 100644
--- a/threepenny-gui.cabal
+++ b/threepenny-gui.cabal
@@ -118,7 +118,7 @@ Library
                     ,stm                    >= 2.2    && < 2.5
                     ,template-haskell       >= 2.7.0  && < 2.11
                     ,text                   >= 0.11   && < 1.3
-                    ,transformers           >= 0.3.0  && < 0.5
+                    ,transformers           >= 0.3.0  && < 0.6
                     ,unordered-containers   == 0.2.*
                     ,websockets             >= 0.8    && < 0.10
                     ,websockets-snap        >= 0.8    && < 0.10