diff --git a/pkgs/development/libraries/haskell/algebra/default.nix b/pkgs/development/libraries/haskell/algebra/default.nix
index 1e054a1cdb4..2044c8ad872 100644
--- a/pkgs/development/libraries/haskell/algebra/default.nix
+++ b/pkgs/development/libraries/haskell/algebra/default.nix
@@ -6,8 +6,8 @@
 
 cabal.mkDerivation (self: {
   pname = "algebra";
-  version = "4.1";
-  sha256 = "1wcwpngaqnr9w89p5dycmpsaihdwqqrs2vjap6jfwrscq16yyyc6";
+  version = "4.2";
+  sha256 = "1b74c55326qsnpyqzyhyq87j61wp3zrpsqhipgw8db8nm2lq9nhs";
   buildDepends = [
     adjunctions distributive mtl nats semigroupoids semigroups tagged
     transformers void