diff --git a/ghc-zlib.changes b/ghc-zlib.changes
index c4c9408..3cd5222 100644
--- a/ghc-zlib.changes
+++ b/ghc-zlib.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Fri Jul  7 18:00:43 UTC 2023 - Peter Simons <psimons@suse.com>
+
+- Update zlib to version 0.6.3.0 revision 2.
+  Upstream has revised the Cabal build instructions on Hackage.
+
 -------------------------------------------------------------------
 Thu Mar 30 17:09:14 UTC 2023 - Peter Simons <psimons@suse.com>
 
diff --git a/ghc-zlib.spec b/ghc-zlib.spec
index 863d345..816a6ed 100644
--- a/ghc-zlib.spec
+++ b/ghc-zlib.spec
@@ -26,7 +26,7 @@ Summary:        Compression and decompression in the gzip and zlib formats
 License:        BSD-2-Clause
 URL:            https://hackage.haskell.org/package/%{pkg_name}
 Source0:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/%{pkg_name}-%{version}.tar.gz
-Source1:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/revision/1.cabal#/%{pkg_name}.cabal
+Source1:        https://hackage.haskell.org/package/%{pkg_name}-%{version}/revision/2.cabal#/%{pkg_name}.cabal
 BuildRequires:  ghc-Cabal-devel
 BuildRequires:  ghc-base-devel
 BuildRequires:  ghc-base-prof
diff --git a/zlib.cabal b/zlib.cabal
index b4ce5c6..6118b0a 100644
--- a/zlib.cabal
+++ b/zlib.cabal
@@ -1,7 +1,7 @@
 cabal-version:   >= 1.10
 name:            zlib
 version:         0.6.3.0
-x-revision: 1
+x-revision: 2
 
 copyright:       (c) 2006-2016 Duncan Coutts
 license:         BSD3
@@ -96,7 +96,7 @@ library
     other-extensions: CApiFFI
 
   build-depends:   base >= 4 && < 4.19,
-                   bytestring >= 0.9 && < 0.12
+                   bytestring >= 0.9 && < 0.13
   if impl(ghc >= 7.0 && < 8.0.3)
     build-depends: ghc-prim