diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # CHANGELOG
 
+## 0.1.1
+### Added
+* DeriveDataTypeable to default-extensions
+
 ## 0.1.0
 ### Added
 * `Labeled`: newtype wrapper with anonymous type parameter of any
diff --git a/hset.cabal b/hset.cabal
--- a/hset.cabal
+++ b/hset.cabal
@@ -1,5 +1,5 @@
 name:                hset
-version:             0.1.0
+version:             0.1.1
 synopsis:            Primitive heterogenous read-only set
 license:             BSD3
 license-file:        LICENSE
@@ -30,6 +30,7 @@
   default-extensions: CPP
                     , ConstraintKinds
                     , DataKinds
+                    , DeriveDataTypeable
                     , FlexibleContexts
                     , FlexibleInstances
                     , GADTs