diff --git a/pkgs/development/libraries/haskell/pipes-concurrency/default.nix b/pkgs/development/libraries/haskell/pipes-concurrency/default.nix
index d931845f16e..970321bf286 100644
--- a/pkgs/development/libraries/haskell/pipes-concurrency/default.nix
+++ b/pkgs/development/libraries/haskell/pipes-concurrency/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "pipes-concurrency";
-  version = "1.2.0";
-  sha256 = "058v9d3wf9n1d25rhdq5vj60p8mll5yv2zn2k1092bg7qisip1fq";
+  version = "1.2.1";
+  sha256 = "036cn6pafqpf2811iigablks3zk747bnzji9ykrgwhpja427vlbl";
   buildDepends = [ pipes stm ];
   meta = {
     description = "Concurrency for the pipes ecosystem";