diff --git a/ChangeLog.md b/ChangeLog.md
new file mode 100644
--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,6 @@
+# ChangeLog for crypton-x509-store
+
+## 1.6.13
+
+* Making buildable with ghc-9.4 and ghc-9.2.
+  [#23](https://github.com/kazu-yamamoto/crypton-certificate/pull/23)
diff --git a/Data/X509/File.hs b/Data/X509/File.hs
--- a/Data/X509/File.hs
+++ b/Data/X509/File.hs
@@ -16,7 +16,7 @@
 import Data.PEM (PEM, pemContent, pemName, pemParseLBS)
 import qualified Data.X509 as X509
 import Data.X509.Memory (pemToKey)
-#if !defined(mingw32_HOST_OS)
+#if !defined(mingw32_HOST_OS) && (MIN_VERSION_unix(2,8,0))
 import System.Posix.IO
 #endif
 
@@ -28,7 +28,7 @@
 
 readPEMs :: FilePath -> IO [PEM]
 readPEMs filepath = do
-#if defined(mingw32_HOST_OS)
+#if defined(mingw32_HOST_OS) || !(MIN_VERSION_unix(2,8,0))
     content <- L.readFile filepath
 #else
     fd <- openFd filepath ReadOnly defaultFileFlags{cloexec = True}
diff --git a/Data/X509/Memory.hs b/Data/X509/Memory.hs
--- a/Data/X509/Memory.hs
+++ b/Data/X509/Memory.hs
@@ -35,7 +35,8 @@
     -> [X509.SignedExact a]
 readSignedObjectFromMemory = either (const []) decodePems . pemParseBS
   where
-    decodePems pems = [ obj | pem <- pems, Right obj <- [X509.decodeSignedObject $ pemContent pem] ]
+    decodePems pems =
+        [obj | pem <- pems, Right obj <- [X509.decodeSignedObject $ pemContent pem]]
 
 pemToKey :: [Maybe X509.PrivKey] -> PEM -> [Maybe X509.PrivKey]
 pemToKey acc pem =
diff --git a/crypton-x509-store.cabal b/crypton-x509-store.cabal
--- a/crypton-x509-store.cabal
+++ b/crypton-x509-store.cabal
@@ -1,52 +1,60 @@
-Name:                crypton-x509-store
-version:             1.6.12
-Description:         X.509 collection accessing and storing methods for certificate, crl, exception list
-License:             BSD3
-License-file:        LICENSE
-Copyright:           Vincent Hanquez <vincent@snarc.org>
-Author:              Vincent Hanquez <vincent@snarc.org>
-Maintainer:          Kazu Yamamoto <kazu@iij.ad.jp>
-Synopsis:            X.509 collection accessing and storing methods
-Build-Type:          Simple
-Category:            Data
-stability:           experimental
-Homepage:            https://github.com/kazu-yamamoto/crypton-certificate
-Cabal-Version:       >= 1.10
-
-Library
-  Default-Language:  Haskell2010
-  Build-Depends:     base >= 3 && < 5
-                   , bytestring
-                   , mtl
-                   , containers
-                   , directory
-                   , filepath
-                   , pem >= 0.1 && < 0.3
-                   , asn1-types >= 0.3 && < 0.4
-                   , asn1-encoding >= 0.9 && < 0.10
-                   , crypton
-                   , crypton-x509 >= 1.7.2
-  if !os(windows)
-      Build-Depends: unix
-  Exposed-modules:   Data.X509.CertificateStore
-                     Data.X509.File
-                     Data.X509.Memory
-  ghc-options:       -Wall
+cabal-version:      >=1.10
+name:               crypton-x509-store
+version:            1.6.13
+license:            BSD3
+license-file:       LICENSE
+copyright:          Vincent Hanquez <vincent@snarc.org>
+maintainer:         Kazu Yamamoto <kazu@iij.ad.jp>
+author:             Vincent Hanquez <vincent@snarc.org>
+stability:          experimental
+homepage:           https://github.com/kazu-yamamoto/crypton-certificate
+synopsis:           X.509 collection accessing and storing methods
+description:
+    X.509 collection accessing and storing methods for certificate, crl, exception list
 
-Test-Suite test-x509-store
-  Default-Language:  Haskell2010
-  type:              exitcode-stdio-1.0
-  hs-source-dirs:    Tests
-  Main-is:           Tests.hs
-  Build-Depends:     base >= 3 && < 5
-                   , bytestring
-                   , tasty
-                   , tasty-hunit
-                   , crypton-x509
-                   , crypton-x509-store
-  ghc-options:       -Wall
+category:           Data
+build-type:         Simple
+extra-source-files: ChangeLog.md
 
 source-repository head
-  type:     git
-  location: https://github.com/kazu-yamamoto/crypton-certificate
-  subdir:   x509-store
+    type:     git
+    location: https://github.com/kazu-yamamoto/crypton-certificate
+    subdir:   x509-store
+
+library
+    exposed-modules:
+        Data.X509.CertificateStore
+        Data.X509.File
+        Data.X509.Memory
+
+    default-language: Haskell2010
+    ghc-options:      -Wall
+    build-depends:
+        base >=3 && <5,
+        bytestring,
+        mtl,
+        containers,
+        directory,
+        filepath,
+        pem >=0.1 && <0.3,
+        asn1-types >=0.3 && <0.4,
+        asn1-encoding >=0.9 && <0.10,
+        crypton,
+        crypton-x509 >=1.7.2
+
+    if !os(windows)
+        build-depends: unix
+
+test-suite test-x509-store
+    type:             exitcode-stdio-1.0
+    main-is:          Tests.hs
+    hs-source-dirs:   Tests
+    default-language: Haskell2010
+    ghc-options:      -Wall
+    build-depends:
+        base >=3 && <5,
+        bytestring,
+        tasty,
+        tasty-hunit,
+        crypton-x509,
+        crypton-x509-store