diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,9 @@
+filepath-bytestring (1.5.2.0.2) unstable; urgency=medium
+
+  * Relax bounds to allow base-4.20 (ghc 9.10.1).
+
+ -- Joey Hess <id@joeyh.name>  Mon, 20 Jan 2025 19:42:24 -0400
+
 filepath-bytestring (1.5.2.0.1) unstable; urgency=medium
 
   * Relax bounds on filepath to all versions for which test suite passes.
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:        1.5.2.0.1
+version:        1.5.2.0.2
 -- 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 && < 4.20,
+        base >= 4 && < 4.21,
         bytestring >= 0.11.3.0,
         filepath >= 1.4.100.4 && < 1.5.0.0 || >= 1.5.2.0 && <= 1.5.4.0
     if os(Windows)