diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,10 @@
+filepath-bytestring (1.4.2.1.7) unstable; urgency=medium
+
+  * Relax QuickCheck bounds to allow 2.14.
+  * Relax base bounds so it will build with ghc 9.0.1.
+
+ -- Joey Hess <id@joeyh.name>  Wed, 17 Mar 2021 08:11:27 -0400
+
 filepath-bytestring (1.4.2.1.6) unstable; urgency=medium
 
   * Added makeValid. All functions from filepath are now implemented.
diff --git a/filepath-bytestring.cabal b/filepath-bytestring.cabal
--- a/filepath-bytestring.cabal
+++ b/filepath-bytestring.cabal
@@ -1,6 +1,6 @@
-cabal-version:  >= 1.18
+cabal-version: 1.18
 name:           filepath-bytestring
-version:        1.4.2.1.6
+version:        1.4.2.1.7
 -- NOTE: Don't forget to update CHANGELOG and the filepath dependency below
 license:        BSD3
 license-file:   LICENSE
@@ -49,7 +49,7 @@
         System.FilePath.Windows.ByteString
 
     build-depends:
-        base >= 4 && < 4.15,
+        base >= 4 && < 4.16,
         bytestring
     if os(Windows)
         build-depends: utf8-string
@@ -72,7 +72,7 @@
         filepath-bytestring,
         base,
         bytestring,
-        QuickCheck >= 2.7 && < 2.14,
+        QuickCheck >= 2.7 && < 2.15,
 	-- Versions of filepath that are equvilant to this
 	-- library, for quickcheck equivilance tests.
         filepath >= 1.4.2 && <= 1.4.2.1