diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for applicable
 
+## 0.4.0.0 -- 2022-06-27
+
+* Fixed missing instances from 0.3.0.0.
+
 ## 0.3.0.0 -- 2022-06-27
 
 * Added more instances.
diff --git a/Data/Applicable.hs b/Data/Applicable.hs
--- a/Data/Applicable.hs
+++ b/Data/Applicable.hs
@@ -53,7 +53,7 @@
 
 -- | A wrapper for functions.
 --   Can be applied to a 'Functor', 'fmap'-ing the function over the inner values.
-newtype ApplyMap a b = AppMap { unAppMap :: a -> b } deriving Functor
+newtype ApplyMap a b = AppMap { unAppMap :: a -> b } deriving (Generic, Functor)
 
 instance Functor f => Applicable (ApplyMap a b) (f a) (f b) where
   AppMap f $* xa = f <$> xa
diff --git a/applicable.cabal b/applicable.cabal
--- a/applicable.cabal
+++ b/applicable.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               applicable
-version:            0.3.0.0
+version:            0.4.0.0
 synopsis:           A class for things that can be applied
 description:        A class for things that can be applied, and utility newtypes
 homepage:           https://github.com/schuelermine/applicable