diff --git a/src/Network/Wikipedia.hs b/src/Network/Wikipedia.hs
--- a/src/Network/Wikipedia.hs
+++ b/src/Network/Wikipedia.hs
@@ -18,6 +18,7 @@
 import Data.List (nub)
 import Data.Maybe (mapMaybe, fromJust)
 import Data.Either
+import Data.Char
 import qualified Data.ByteString.Lazy.Char8 as BC
 import qualified Data.ByteString.Lazy as ByteString
 import qualified Codec.Compression.GZip as GZip
@@ -26,7 +27,10 @@
                  | WikiArticleSRC  { waTitle :: String, waContent :: String } deriving (Show, Ord, Eq)
 
 sanitizeFileName :: FilePath -> FilePath
-sanitizeFileName cs = makeValid cs
+sanitizeFileName cs = map removeNonAscii $ makeValid cs
+  where
+    removeNonAscii z | isAscii z = z
+                     | otherwise = '_'
 
 isArticleURL :: URL -> Bool
 isArticleURL (URL (Absolute (Host (HTTP False) xs Nothing)) ph []) = (xs =~ ".*en[.]wikipedia.org$") && (ph =~ "wiki/[^/]+$" )
diff --git a/wikipedia4epub.cabal b/wikipedia4epub.cabal
--- a/wikipedia4epub.cabal
+++ b/wikipedia4epub.cabal
@@ -1,5 +1,5 @@
 Name:            wikipedia4epub
-Version:         0.0.8
+Version:         0.0.9
 License:         BSD3
 License-File:    LICENSE
 Homepage:        http://rampa.sk/static/wikipedia4epub.html