diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,9 @@
+filepath-bytestring (1.4.2.1.9) unstable; urgency=medium
+
+  * Relax bounds to allow base 4.16 (ghc 9.2).
+
+ -- Joey Hess <id@joeyh.name>  Fri, 03 Dec 2021 11:49:58 -0400
+
 filepath-bytestring (1.4.2.1.8) unstable; urgency=medium
 
   * Faster implementations of encodeFilePath and decodeFilePath.
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
 name:           filepath-bytestring
-version:        1.4.2.1.8
+version:        1.4.2.1.9
 -- 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 && < 4.16,
+        base >= 4 && < 4.17,
         bytestring
     if os(Windows)
         build-depends: utf8-string