diff --git a/pkgs/development/libraries/haskell/classy-prelude-conduit/default.nix b/pkgs/development/libraries/haskell/classy-prelude-conduit/default.nix
index 5324054423b4..e63f2e8ac789 100644
--- a/pkgs/development/libraries/haskell/classy-prelude-conduit/default.nix
+++ b/pkgs/development/libraries/haskell/classy-prelude-conduit/default.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "classy-prelude-conduit";
-  version = "0.9.0";
-  sha256 = "1lvi5n2km6l2saspiczpkvaq6670bp658kn83s334h6s6wlba3dz";
+  version = "0.9.1";
+  sha256 = "1y3jxhly9y1yhr2qz3b1jf6sg4s0mwq9xq1mp765wa20hmwjayvg";
   buildDepends = [
     classyPrelude conduit conduitCombinators monadControl resourcet
     systemFileio transformers void