diff --git a/simple-sendfile.cabal b/simple-sendfile.cabal
--- a/simple-sendfile.cabal
+++ b/simple-sendfile.cabal
@@ -1,5 +1,5 @@
 Name:                   simple-sendfile
-Version:                0.2.17
+Version:                0.2.18
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -24,7 +24,6 @@
   Build-Depends:        base >= 4 && < 5
                       , network
                       , bytestring
-                      , resourcet
   -- NetBSD and OpenBSD don't have sendfile
   if os(freebsd) && flag(allow-bsd)
     CPP-Options:        -DOS_BSD
@@ -47,6 +46,7 @@
         Build-Depends:  conduit         >= 1.0 && < 1.3
                       , conduit-extra   >= 1.0 && < 1.2
                       , transformers    >= 0.2.2 && < 0.5
+                      , resourcet
 
 Test-Suite spec
   Type:                 exitcode-stdio-1.0