diff --git a/fused-effects-exceptions.cabal b/fused-effects-exceptions.cabal
index 5a8ecbb..5fe9c22 100644
--- a/fused-effects-exceptions.cabal
+++ b/fused-effects-exceptions.cabal
@@ -1,5 +1,7 @@
+cabal-version:       2.4
+
 name:                fused-effects-exceptions
-version:             0.1.1.0
+version:             0.2.0.0
 synopsis:            Handle exceptions thrown in IO with fused-effects.
 description:         Provides an effect that enables catching exceptions thrown from impure computations such as 'IO'.
 homepage:            https://github.com/patrickt/fused-effects-exceptions#readme
@@ -8,7 +10,7 @@ license-file:        LICENSE
 author:              Josh Vera
 maintainer:          patrickt@github.com
 copyright:           2019 Josh Vera and Patrick Thomson
-category:            Control.
+category:            Control
 build-type:          Simple
 cabal-version:       >=1.10
 extra-source-files:  README.md
@@ -19,10 +21,10 @@ library
   hs-source-dirs:      src
   default-language:    Haskell2010
   exposed-modules:     Control.Effect.Catch
-  build-depends:       base >= 4.7 && < 5
-                     , fused-effects >= 0.3 && <1
+  build-depends:       base            >= 4.7 && < 5
+                     , fused-effects   ^>= 0.5
                      , safe-exceptions >= 0.1 && <1
-                     , unliftio-core >= 0.1.2 && <1
+                     , unliftio-core   >= 0.1.2 && <1
 
 source-repository head
   type:     git
diff --git a/src/Control/Effect/Catch.hs b/src/Control/Effect/Catch.hs
index e326b36..662a381 100644
--- a/src/Control/Effect/Catch.hs
+++ b/src/Control/Effect/Catch.hs
@@ -27,12 +27,12 @@ import           Control.Monad.IO.Class
 import           Control.Monad.IO.Unlift
 
 data Catch m k
-  = forall output e . Exc.Exception e => CatchIO (m output) (e -> m output) (output -> k)
+  = forall output e . Exc.Exception e => CatchIO (m output) (e -> m output) (output -> m k)
 
-deriving instance Functor (Catch m)
+deriving instance Functor m => Functor (Catch m)
 
 instance HFunctor Catch where
-  hmap f (CatchIO go cleanup k) = CatchIO (f go) (f . cleanup) k
+  hmap f (CatchIO go cleanup k) = CatchIO (f go) (f . cleanup) (f . k)
 
 instance Effect Catch where
   handle state handler (CatchIO go cleanup k)