diff --git a/fast-logger.cabal b/fast-logger.cabal
--- a/fast-logger.cabal
+++ b/fast-logger.cabal
@@ -1,5 +1,5 @@
 Name:                   fast-logger
-Version:                0.3.2
+Version:                0.3.3
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -28,7 +28,7 @@
                       , time
   else
     Build-Depends:      unix
-                      , unix-time
+                      , unix-time >= 0.2
 
 Test-Suite spec
     Main-Is:         Spec.hs