diff --git a/flow2dot.cabal b/flow2dot.cabal
--- a/flow2dot.cabal
+++ b/flow2dot.cabal
@@ -1,5 +1,5 @@
 Name:    flow2dot
-Version: 0.9.0.1
+Version: 0.9.0.2
 License: BSD3
 License-File: LICENSE
 Author: Dmitry Astapov <dastapov@gmail.com>
diff --git a/flow2dot.hs b/flow2dot.hs
--- a/flow2dot.hs
+++ b/flow2dot.hs
@@ -17,7 +17,7 @@
 import System.IO.UTF8 (putStrLn)
 import Prelude hiding (putStrLn)
 #endif
-import System (getArgs)
+import System.Environment (getArgs)
 
 main :: IO ()
 main = do