diff --git a/pkgs/development/libraries/haskell/lens/4.0.4.nix b/pkgs/development/libraries/haskell/lens/4.0.5.nix
similarity index 94%
rename from pkgs/development/libraries/haskell/lens/4.0.4.nix
rename to pkgs/development/libraries/haskell/lens/4.0.5.nix
index cd85c7a4e94b..7c347f69ce4c 100644
--- a/pkgs/development/libraries/haskell/lens/4.0.4.nix
+++ b/pkgs/development/libraries/haskell/lens/4.0.5.nix
@@ -10,8 +10,8 @@
 
 cabal.mkDerivation (self: {
   pname = "lens";
-  version = "4.0.4";
-  sha256 = "14xa500afjpdfx3qqxr9dg5x8mxrna7c3b5xchqsrwck9d00cphd";
+  version = "4.0.5";
+  sha256 = "1kjmi76zpkhkwn514inhpfhfh3pg5na1f2zw1faqnk3bylpp9h6g";
   buildDepends = [
     aeson bifunctors comonad constraints contravariant distributive
     exceptions filepath hashable mtl parallel primitive profunctors
diff --git a/pkgs/top-level/haskell-packages.nix b/pkgs/top-level/haskell-packages.nix
index 846c24204b8d..2bc148d84a3f 100644
--- a/pkgs/top-level/haskell-packages.nix
+++ b/pkgs/top-level/haskell-packages.nix
@@ -1585,8 +1585,8 @@ let result = let callPackage = x : y : modifyPrio (newScope result.finalReturn x
   leksahServer = callPackage ../development/libraries/haskell/leksah/leksah-server.nix {};
 
   lens_3_10_2 = callPackage ../development/libraries/haskell/lens/3.10.2.nix {};
-  lens_4_0_4 = callPackage ../development/libraries/haskell/lens/4.0.4.nix {};
-  lens = self.lens_4_0_4;
+  lens_4_0_5 = callPackage ../development/libraries/haskell/lens/4.0.5.nix {};
+  lens = self.lens_4_0_5;
 
   lensAeson = callPackage ../development/libraries/haskell/lens-aeson {};