diff --git a/Data/X509/File.hs b/Data/X509/File.hs
--- a/Data/X509/File.hs
+++ b/Data/X509/File.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE CPP #-}
+
 module Data.X509.File (
     readSignedObject,
     readKeyFile,
@@ -14,6 +16,9 @@
 import Data.PEM (PEM, pemContent, pemName, pemParseLBS)
 import qualified Data.X509 as X509
 import Data.X509.Memory (pemToKey)
+#if !defined(mingw32_HOST_OS)
+import System.Posix.IO
+#endif
 
 newtype PEMError = PEMError {displayPEMError :: String}
     deriving (Show)
@@ -23,7 +28,13 @@
 
 readPEMs :: FilePath -> IO [PEM]
 readPEMs filepath = do
+#if defined(mingw32_HOST_OS)
     content <- L.readFile filepath
+#else
+    fd <- openFd filepath ReadOnly defaultFileFlags{cloexec = True}
+    h <- fdToHandle fd
+    content <- L.hGetContents h
+#endif
     either (throw . PEMError) pure $ pemParseLBS content
 
 -- | return all the signed objects in a file.
diff --git a/crypton-x509-store.cabal b/crypton-x509-store.cabal
--- a/crypton-x509-store.cabal
+++ b/crypton-x509-store.cabal
@@ -1,5 +1,5 @@
 Name:                crypton-x509-store
-version:             1.6.11
+version:             1.6.12
 Description:         X.509 collection accessing and storing methods for certificate, crl, exception list
 License:             BSD3
 License-file:        LICENSE
@@ -26,6 +26,8 @@
                    , 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
@@ -46,5 +48,5 @@
 
 source-repository head
   type:     git
-  location: git://github.com/vincenthz/hs-certificate
+  location: https://github.com/kazu-yamamoto/crypton-certificate
   subdir:   x509-store