diff --git a/FileCGIApp.hs b/FileCGIApp.hs
--- a/FileCGIApp.hs
+++ b/FileCGIApp.hs
@@ -12,8 +12,9 @@
 fileCgiApp :: AppSpec -> RouteDB -> Application
 fileCgiApp spec um req = case mmp of
     Nothing -> return $ responseLBS statusNotFound
-                                    [("Content-Type", "text/plain")]
-                                    "Not found"
+                                    [("Content-Type", "text/plain")
+                                    ,("Server", softwareName spec)]
+                                    "Not Found\r\n"
     Just (Route src op dst) -> case op of
         OpFile -> fileApp spec (FileRoute src dst) req
         OpCGI  -> cgiApp  spec (CgiRoute  src dst) req
diff --git a/Types.hs b/Types.hs
--- a/Types.hs
+++ b/Types.hs
@@ -15,4 +15,4 @@
 programName = "Mighttpd"
 
 programVersion :: String
-programVersion = "2.1.1"
+programVersion = "2.1.2"
diff --git a/mighttpd2.cabal b/mighttpd2.cabal
--- a/mighttpd2.cabal
+++ b/mighttpd2.cabal
@@ -1,5 +1,5 @@
 Name:                   mighttpd2
-Version:                2.1.1
+Version:                2.1.2
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3