diff --git a/Prolude/Foldable.hs b/Prolude/Foldable.hs
--- a/Prolude/Foldable.hs
+++ b/Prolude/Foldable.hs
@@ -1,10 +1,12 @@
 module Prolude.Foldable
     ( module Data.Foldable
     , module Data.Map
+    , module Data.Set
     , module GHC.Exts
     )
 where
 
 import Data.Foldable (toList)
 import Data.Map (Map)
+import Data.Set (Set)
 import GHC.Exts (fromList)
diff --git a/prolude.cabal b/prolude.cabal
--- a/prolude.cabal
+++ b/prolude.cabal
@@ -1,7 +1,7 @@
 cabal-version: >= 1.10
 
 name: prolude
-version: 0.0.0.3
+version: 0.0.0.4
 synopsis: ITProTV's custom prelude
 description:
     Prolude is ITProTV's custom prelude.