diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,8 @@
+### 0.1.1.0
+
+- Re-export `CInt` and `CUInt` like in module *NgxExport* instead of
+  `unsafePerformIO`.
+
 ### 0.1.0.0
 
 - Initial version.
diff --git a/NgxExport/Tools.hs b/NgxExport/Tools.hs
--- a/NgxExport/Tools.hs
+++ b/NgxExport/Tools.hs
@@ -32,8 +32,10 @@
                        ,ngxExportSimpleService
                        ,ngxExportSimpleServiceTyped
                        ,ngxExportSimpleServiceTypedAsJSON
-    -- * Re-exported functions needed for building simple services
-                       ,unsafePerformIO
+    -- * Re-exported data constructors from /Foreign.C/
+    --   (for marshalling in foreign calls)
+                       ,Foreign.C.Types.CInt (..)
+                       ,Foreign.C.Types.CUInt (..)
                        ) where
 
 import           NgxExport
@@ -122,8 +124,7 @@
 --
 -- module TestTools where
 --
--- import NgxExport
--- import NgxExport.Tools
+-- import           NgxExport.Tools
 --
 -- import           Data.ByteString (ByteString)
 -- import qualified Data.ByteString.Lazy as L
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:                    0.1.0.0
+version:                    0.1.1.0
 synopsis:                   Extra tools for Nginx haskell module
 description:                Extra tools for
         <http://github.com/lyokha/nginx-haskell-module Nginx haskell module>
@@ -18,7 +18,7 @@
 library
   build-depends:            base >= 4.8 && < 5
                           , template-haskell >= 2.11.0.0
-                          , ngx-export >= 1.4.1
+                          , ngx-export >= 1.5.0
                           , bytestring >= 0.10.0.0
                           , aeson >= 1.0
                           , safe