diff --git a/wai-logger.cabal b/wai-logger.cabal
--- a/wai-logger.cabal
+++ b/wai-logger.cabal
@@ -1,5 +1,5 @@
 Name:                   wai-logger
-Version:                2.0.0
+Version:                2.0.1
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -28,6 +28,8 @@
                       , wai >= 2.0.0
   if os(windows)
       Cpp-Options:      -DWINDOWS
+      Build-Depends:    time
+                      , old-locale
   else
       Build-Depends:    unix
                       , unix-time