diff --git a/ClassyPrelude.hs b/ClassyPrelude.hs
--- a/ClassyPrelude.hs
+++ b/ClassyPrelude.hs
@@ -255,5 +255,5 @@
 -- | Sort elements using the user supplied function to project something out of
 -- each element.
 -- Inspired by <http://hackage.haskell.org/packages/archive/base/latest/doc/html/GHC-Exts.html#v:sortWith>.
-sortWith :: (CanSortBy c a, Ord b) => (a -> b) -> c a -> c a
+sortWith :: (CanSortBy c a, Ord b) => (a -> b) -> c -> c
 sortWith f = sortBy $ comparing f
diff --git a/ClassyPrelude/Classes.hs b/ClassyPrelude/Classes.hs
--- a/ClassyPrelude/Classes.hs
+++ b/ClassyPrelude/Classes.hs
@@ -183,10 +183,12 @@
 class CanIntersection c where
     intersection :: c -> c -> c
 
-class CanSortBy c a where
-    sortBy :: (a -> a -> Ordering) -> c a -> c a
-    sort :: c a -> c a
-    default sort :: (Ord a) => c a -> c a
+class CanSortBy c a | c -> a where
+    sortBy :: (a -> a -> Ordering) -> c -> c
+
+class Ord a => CanSort c a | c -> a where
+    sort :: c -> c
+    default sort :: CanSortBy c a => c -> c
     sort = sortBy compare
 
 class CanCons c a where
diff --git a/ClassyPrelude/List.hs b/ClassyPrelude/List.hs
--- a/ClassyPrelude/List.hs
+++ b/ClassyPrelude/List.hs
@@ -131,8 +131,10 @@
 instance (Eq a) => CanIntersection [a] where
     intersection = List.intersect
 
-instance (Ord a) => CanSortBy [] a where
+instance CanSortBy [a] a where
     sortBy = List.sortBy
+instance Ord a => CanSort [a] a where
+    sort = List.sort
 
 instance CanCons [a] a where
     cons = (:)
diff --git a/classy-prelude.cabal b/classy-prelude.cabal
--- a/classy-prelude.cabal
+++ b/classy-prelude.cabal
@@ -1,5 +1,5 @@
 name:                classy-prelude
-version:             0.5.1
+version:             0.5.2
 synopsis:            A typeclass-based Prelude.
 description:         Focuses on using common typeclasses when possible, and creating new ones to avoid name clashing. Exposes many recommended datastructures (Map, ByteString, etc) directly without requiring long import lists and qualified modules.
 homepage:            https://github.com/snoyberg/classy-prelude
@@ -28,7 +28,7 @@
                        ClassyPrelude.HashSet
                        ClassyPrelude.Char
   build-depends:       base                          >= 4          && < 5
-                     , basic-prelude                 >= 0.3.2      && < 0.4
+                     , basic-prelude                 >= 0.3.3      && < 0.4
                      , system-filepath               >= 0.4        && < 0.5
                      , transformers
                      , containers                    >= 0.4.2