diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,9 @@
+filepath-bytestring (1.4.2.1.13) unstable; urgency=medium
+
+  * Relax bounds to allow base-4.18 and filepath-1.4.100.3 (ghc 9.6).
+
+ -- Joey Hess <id@joeyh.name>  Tue, 20 Jun 2023 12:22:31 -0400
+
 filepath-bytestring (1.4.2.1.12) unstable; urgency=medium
 
   * Relax bounds to allow base 4.17 (ghc 9.4).
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:        1.4.2.1.12
+version:        1.4.2.1.13
 -- NOTE: Don't forget to update CHANGELOG and the filepath dependency below
 license:        BSD3
 license-file:   LICENSE
@@ -53,7 +53,7 @@
         System.FilePath.Windows.ByteString
 
     build-depends:
-        base >= 4 && < 4.18,
+        base >= 4 && < 4.19,
         bytestring >= 0.11.2.0
     if os(Windows)
         build-depends: utf8-string
@@ -79,7 +79,7 @@
         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
+        filepath >= 1.4.2 && <= 1.4.100.3
 
 benchmark filepath-bench
     type: exitcode-stdio-1.0