diff --git a/CHANGES.txt b/CHANGES.txt
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,5 +1,7 @@
 Changelog for Safe
 
+0.3.6
+    #6, remove unnecessary Ord constraints from maximumBy/minimumBy
 0.3.5
     Add Safe elemIndexJust/findIndexJust functions
     Add Safe scan functions
diff --git a/Safe.hs b/Safe.hs
--- a/Safe.hs
+++ b/Safe.hs
@@ -148,15 +148,15 @@
 minimumNote note = fromNote note "minumumNote []" . minimumMay
 maximumNote note = fromNote note "maximumNote []" . maximumMay
 
-minimumByMay, maximumByMay :: Ord a => (a -> a -> Ordering) -> [a] -> Maybe a
+minimumByMay, maximumByMay :: (a -> a -> Ordering) -> [a] -> Maybe a
 minimumByMay = liftMay null . minimumBy
 maximumByMay = liftMay null . maximumBy
 
-minimumByDef, maximumByDef :: Ord a => a -> (a -> a -> Ordering) -> [a] -> a
+minimumByDef, maximumByDef :: a -> (a -> a -> Ordering) -> [a] -> a
 minimumByDef def = fromMaybe def .^ minimumByMay
 maximumByDef def = fromMaybe def .^ maximumByMay
 
-minimumByNote, maximumByNote :: Ord a => String -> (a -> a -> Ordering) -> [a] -> a
+minimumByNote, maximumByNote :: String -> (a -> a -> Ordering) -> [a] -> a
 minimumByNote note = fromNote note "minumumByNote []" .^ minimumByMay
 maximumByNote note = fromNote note "maximumByNote []" .^ maximumByMay
 
diff --git a/safe.cabal b/safe.cabal
--- a/safe.cabal
+++ b/safe.cabal
@@ -1,7 +1,7 @@
 cabal-version:  >= 1.6
 build-type:     Simple
 name:           safe
-version:        0.3.5
+version:        0.3.6
 license:        BSD3
 license-file:   LICENSE
 category:       Unclassified