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:                0.2.26
+Version:                0.2.27
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
@@ -46,8 +46,8 @@
         Build-Depends:  unix
       else
         Other-Modules:  Network.Sendfile.Fallback
-        Build-Depends:  conduit         >= 1.0 && < 1.3
-                      , conduit-extra   >= 1.0 && < 1.3
+        Build-Depends:  conduit         >= 1.0 && < 1.4
+                      , conduit-extra   >= 1.0 && < 1.4
                       , transformers    >= 0.2.2 && < 0.6
                       , resourcet