diff --git a/Network/Wai/Application/Classic/CGI.hs b/Network/Wai/Application/Classic/CGI.hs
--- a/Network/Wai/Application/Classic/CGI.hs
+++ b/Network/Wai/Application/Classic/CGI.hs
@@ -45,7 +45,7 @@
 cgiApp spec cgii req = case method of
     "GET"  -> cgiApp' False spec cgii req
     "POST" -> cgiApp' True  spec cgii req
-    _      -> return $ responseLBS statusNotAllowed textPlain "Method Not Allowed"
+    _      -> return $ responseLBS statusNotAllowed textPlain "Method Not Allowed\r\n"
   where
     method = requestMethod req
 
diff --git a/Network/Wai/Application/Classic/File.hs b/Network/Wai/Application/Classic/File.hs
--- a/Network/Wai/Application/Classic/File.hs
+++ b/Network/Wai/Application/Classic/File.hs
@@ -142,7 +142,7 @@
 ----------------------------------------------------------------
 
 notFound :: RspSpec
-notFound = RspSpec statusNotFound textPlain (BodyLBS "Not Found")
+notFound = RspSpec statusNotFound textPlain (BodyLBS "Not Found\r\n")
 
 notAllowed :: RspSpec
-notAllowed = RspSpec statusNotAllowed textPlain (BodyLBS "Method Not Allowed")
+notAllowed = RspSpec statusNotAllowed textPlain (BodyLBS "Method Not Allowed\r\n")
diff --git a/wai-app-file-cgi.cabal b/wai-app-file-cgi.cabal
--- a/wai-app-file-cgi.cabal
+++ b/wai-app-file-cgi.cabal
@@ -1,5 +1,5 @@
 Name:                   wai-app-file-cgi
-Version:                0.1.1
+Version:                0.1.2
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3