diff --git a/NgxExport/Tools.hs b/NgxExport/Tools.hs
--- a/NgxExport/Tools.hs
+++ b/NgxExport/Tools.hs
@@ -74,7 +74,7 @@
 import           System.IO.Unsafe (unsafePerformIO)
 import           Safe
 
-foreign import ccall "exit" exit :: CInt -> IO ()
+foreign import ccall unsafe "exit" exit :: CInt -> IO ()
 
 -- | Terminates current Nginx worker process.
 --
diff --git a/ngx-export-tools.cabal b/ngx-export-tools.cabal
--- a/ngx-export-tools.cabal
+++ b/ngx-export-tools.cabal
@@ -1,5 +1,5 @@
 name:                       ngx-export-tools
-version:                    0.4.2.1
+version:                    0.4.2.2
 synopsis:                   Extra tools for Nginx haskell module
 description:                Extra tools for
         <http://github.com/lyokha/nginx-haskell-module Nginx haskell module>.