diff --git a/pkgs/development/libraries/haskell/semigroups/default.nix b/pkgs/development/libraries/haskell/semigroups/default.nix
index f1bc7259b799..a0e79c459d9e 100644
--- a/pkgs/development/libraries/haskell/semigroups/default.nix
+++ b/pkgs/development/libraries/haskell/semigroups/default.nix
@@ -2,8 +2,8 @@
 
 cabal.mkDerivation (self: {
   pname = "semigroups";
-  version = "0.12";
-  sha256 = "0wk8hxak4dl8nbdif4f8z9gvr5bqm95inrvrcrb6ryaxichrn432";
+  version = "0.12.1";
+  sha256 = "0jxgd487d99cc721wyaxvazphlv567hbb57vdfjn4hq9ly4w464q";
   buildDepends = [ hashable nats text unorderedContainers ];
   meta = {
     homepage = "http://github.com/ekmett/semigroups/";