diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+1.0.1 (Changes from 1.0.0)
+=========================
+* Bump dependency on transformers
+
 1.0.0 (Changes from 0.1.0)
 =========================
 * added support for folds and traversals
diff --git a/lens-family-core.cabal b/lens-family-core.cabal
--- a/lens-family-core.cabal
+++ b/lens-family-core.cabal
@@ -1,6 +1,6 @@
 name:               lens-family-core
 category:           Data, Lenses
-version:            1.0.0
+version:            1.0.1
 license:            BSD3
 cabal-version:      >= 1.6
 license-file:       LICENSE
@@ -36,7 +36,7 @@
   build-depends:
     base                 >= 4       && < 5,
     containers           >= 0.3     && < 0.6,
-    transformers         >= 0.2.0   && < 0.4
+    transformers         >= 0.2.0   && < 0.5
 
   exposed-modules:
     Lens.Family.Unchecked