diff --git a/pkgs/development/libraries/haskell/midi/default.nix b/pkgs/development/libraries/haskell/midi/default.nix
index 71593bd21cd..c7f104640ce 100644
--- a/pkgs/development/libraries/haskell/midi/default.nix
+++ b/pkgs/development/libraries/haskell/midi/default.nix
@@ -4,8 +4,8 @@
 
 cabal.mkDerivation (self: {
   pname = "midi";
-  version = "0.2.1.2";
-  sha256 = "077cxdazr97hjpq42l7hjn905pfhyshvaiwqjdfnzhjv6r48q4zk";
+  version = "0.2.1.3";
+  sha256 = "0mqf6q7686zdxljkz3bqa2zhkgirqz5c1fkbd3n4wyipzhjc773a";
   buildDepends = [
     binary eventList explicitException monoidTransformer nonNegative
     QuickCheck random transformers utilityHt