input-output-hk
diff --git a/‎fs-api/CHANGELOG.md
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diff --git a/‎fs-api/fs-api.cabal
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diff --git a/‎fs-sim/CHANGELOG.md
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diff --git a/‎fs-sim/fs-sim.cabal
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@@ -2,6 +2,8 @@
 
 ## ?.?.?.? -- ????-??-??
 
+## 0.4.0.0 -- 2025-05-30
+
 ### Breaking
 
 * Add a new `MustExist` option to `AllowExisting`.
@@ -16,14 +18,14 @@
 
 * Make it build with `ghc-9.12`.
 * Drop support for `ghc-8.10` and `ghc-9.2`.
+* Support `io-classes-1.8`.
 * Bugfix: opening a file in read mode now expects the file to exist already.
   This was already the semantics when using `hOpen` from the `ioHasFS` instance,
   but it was not reflected in the `allowExisting` function. `allowExisting
   Readmode` now returns `MustExist` instead of `AllowExisting`.
 * Bugfix: `hGetBufExactly` and `hGetBufExactlyAt` would previously try to read
   too many bytes in the presence of partial reads. These functions now properly
   count the number of remaining bytes that have to be read.
-* Support `io-classes-1.8`
 
 ## 0.3.0.1 -- 2024-10-02
 
 
@@ -1,6 +1,6 @@
 cabal-version:   3.0
 name:            fs-api
-version:         0.3.0.1
+version:         0.4.0.0
 synopsis:        Abstract interface for the file system
 description:     Abstract interface for the file system.
 license:         Apache-2.0
 
@@ -2,6 +2,8 @@
 
 ## ?.?.?.? -- ????-??-??
 
+## 0.4.0.0 -- 2025-05-30
+
 ### Breaking
 
 * Fix a bug where `withErrors` would not put back the previous `Errors` when an
@@ -32,8 +34,8 @@
 ### Patch
 
 * Make it build with `ghc-9.12`.
-* Support `io-classes-1.8`.
 * Drop support for `ghc-8.10` and `ghc-9.2`.
+* Support `io-classes-1.8`.
 * Support the new `MustExist` option for `AllowExisting` that was added in
   `fs-api`.
 
 
@@ -1,6 +1,6 @@
 cabal-version:   3.0
 name:            fs-sim
-version:         0.3.1.0
+version:         0.4.0.0
 synopsis:        Simulated file systems
 description:     Simulated file systems.
 license:         Apache-2.0
@@ -42,7 +42,7 @@ library
     , base16-bytestring      ^>=0.1  || ^>=1.0
     , bytestring             ^>=0.10 || ^>=0.11 || ^>=0.12
     , containers             ^>=0.5  || ^>=0.6  || ^>=0.7
-    , fs-api                 ^>=0.3
+    , fs-api                 ^>=0.4
     , io-classes             ^>=1.6  || ^>=1.7  || ^>=1.8
     , io-classes:strict-stm
     , mtl                    ^>=2.2  || ^>=2.3