diff --git a/CHANGES.txt b/CHANGES.txt
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,5 +1,7 @@
 Changelog for Safe
 
+0.3.19, released 2020-05-24
+    #30, undeprecate maximumDef and friends, fold*1Def
 0.3.18, released 2019-12-04
     #27, deprecate maximumDef and friends, fold*1Def
     #27, add maximumBounded and friends
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright Neil Mitchell 2007-2019.
+Copyright Neil Mitchell 2007-2020.
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
diff --git a/Safe.hs b/Safe.hs
--- a/Safe.hs
+++ b/Safe.hs
@@ -53,7 +53,7 @@
     succMay, succDef, succNote, succSafe,
     predMay, predDef, predNote, predSafe,
     indexMay, indexDef, indexNote,
-    -- * Deprecated
+    -- * Discouraged
     minimumDef, maximumDef, minimumByDef, maximumByDef
     ) where
 
@@ -366,20 +366,23 @@
 indexNote :: (Partial, Ix a) => String -> (a, a) -> a -> Int
 indexNote note x y = withFrozenCallStack $ fromNote note "indexNote, out of range" $ indexMay x y
 
+
 ---------------------------------------------------------------------
--- DEPRECATED
+-- DISCOURAGED
 
-{-# DEPRECATED minimumDef "Use @minimumBound@ instead." #-}
-{-# DEPRECATED maximumDef "Use @maximumBound@ instead." #-}
+-- | New users are recommended to use 'minimumBound' or 'maximumBound' instead.
 minimumDef, maximumDef :: Ord a => a -> [a] -> a
 minimumDef def = fromMaybe def . minimumMay
 maximumDef def = fromMaybe def . maximumMay
 
-{-# DEPRECATED minimumByDef "Use @minimumBoundBy@ instead." #-}
-{-# DEPRECATED maximumByDef "Use @maximumBoundBy@ instead." #-}
+-- | New users are recommended to use 'minimumBoundBy' or 'maximumBoundBy' instead.
 minimumByDef, maximumByDef :: a -> (a -> a -> Ordering) -> [a] -> a
 minimumByDef def = fromMaybe def .^ minimumByMay
 maximumByDef def = fromMaybe def .^ maximumByMay
+
+
+---------------------------------------------------------------------
+-- DEPRECATED
 
 {-# DEPRECATED foldr1Def "Use @foldr1May@ instead." #-}
 {-# DEPRECATED foldl1Def "Use @foldl1May@ instead." #-}
diff --git a/Safe/Foldable.hs b/Safe/Foldable.hs
--- a/Safe/Foldable.hs
+++ b/Safe/Foldable.hs
@@ -17,9 +17,10 @@
     maximumBoundBy, minimumBoundBy,
     maximumBounded, maximumBound,
     minimumBounded, minimumBound,
+    -- * Discouraged
+    minimumDef, maximumDef, minimumByDef, maximumByDef,
     -- * Deprecated
     foldl1Safe, foldr1Safe, findJustSafe,
-    minimumDef, maximumDef, minimumByDef, maximumByDef
     ) where
 
 import Safe.Util
@@ -107,6 +108,25 @@
 
 
 ---------------------------------------------------------------------
+-- DISCOURAGED
+
+-- | New users are recommended to use 'minimumBound' or 'maximumBound' instead.
+minimumDef, maximumDef :: (Foldable t, Ord a) => a -> t a -> a
+minimumDef def = fromMaybe def . minimumMay
+maximumDef def = fromMaybe def . maximumMay
+
+-- | New users are recommended to use 'minimumBoundBy' or 'maximumBoundBy' instead.
+minimumByDef, maximumByDef :: Foldable t => a -> (a -> a -> Ordering) -> t a -> a
+minimumByDef def = fromMaybe def .^ minimumByMay
+maximumByDef def = fromMaybe def .^ maximumByMay
+
+-- | New users are recommended to use 'foldr1May' or 'foldl1May' instead.
+foldl1Def, foldr1Def :: Foldable t => a -> (a -> a -> a) -> t a -> a
+foldl1Def def = fromMaybe def .^ foldl1May
+foldr1Def def = fromMaybe def .^ foldr1May
+
+
+---------------------------------------------------------------------
 -- DEPRECATED
 
 {-# DEPRECATED foldl1Safe "Use @foldl f mempty@ instead." #-}
@@ -120,21 +140,3 @@
 {-# DEPRECATED findJustSafe "Use @findJustDef mempty@ instead." #-}
 findJustSafe :: (Monoid m, Foldable t) => (m -> Bool) -> t m -> m
 findJustSafe = findJustDef mempty
-
-{-# DEPRECATED minimumDef "Use @minimumBound@ instead." #-}
-{-# DEPRECATED maximumDef "Use @maximumBound@ instead." #-}
-minimumDef, maximumDef :: (Foldable t, Ord a) => a -> t a -> a
-minimumDef def = fromMaybe def . minimumMay
-maximumDef def = fromMaybe def . maximumMay
-
-{-# DEPRECATED minimumByDef "Use @minimumBoundBy@ instead." #-}
-{-# DEPRECATED maximumByDef "Use @maximumBoundBy@ instead." #-}
-minimumByDef, maximumByDef :: Foldable t => a -> (a -> a -> Ordering) -> t a -> a
-minimumByDef def = fromMaybe def .^ minimumByMay
-maximumByDef def = fromMaybe def .^ maximumByMay
-
-{-# DEPRECATED foldr1Def "Use @foldr1May@ instead." #-}
-{-# DEPRECATED foldl1Def "Use @foldl1May@ instead." #-}
-foldl1Def, foldr1Def :: Foldable t => a -> (a -> a -> a) -> t a -> a
-foldl1Def def = fromMaybe def .^ foldl1May
-foldr1Def def = fromMaybe def .^ foldr1May
diff --git a/safe.cabal b/safe.cabal
--- a/safe.cabal
+++ b/safe.cabal
@@ -1,17 +1,17 @@
 cabal-version:  >= 1.18
 build-type:     Simple
 name:           safe
-version:        0.3.18
+version:        0.3.19
 license:        BSD3
 license-file:   LICENSE
 category:       Unclassified
 author:         Neil Mitchell <ndmitchell@gmail.com>
 maintainer:     Neil Mitchell <ndmitchell@gmail.com>
-copyright:      Neil Mitchell 2007-2019
+copyright:      Neil Mitchell 2007-2020
 homepage:       https://github.com/ndmitchell/safe#readme
 synopsis:       Library of safe (exception free) functions
 bug-reports:    https://github.com/ndmitchell/safe/issues
-tested-with:    GHC==8.8.1, GHC==8.6.5, GHC==8.4.4, GHC==8.2.2, GHC==8.0.2, GHC==7.10.3
+tested-with:    GHC==8.10.1, GHC==8.8.3, GHC==8.6.5, GHC==8.4.4, GHC==8.2.2, GHC==8.0.2
 description:
     A library wrapping @Prelude@/@Data.List@ functions that can throw exceptions, such as @head@ and @!!@.
     Each unsafe function has up to four variants, e.g. with @tail@:
@@ -44,7 +44,7 @@
 library
     default-language: Haskell2010
     build-depends:
-        base >= 4.5 && < 5
+        base >= 4.8 && < 5
 
     exposed-modules:
         Safe