diff --git a/pkgs/development/libraries/haskell/hakyll/default.nix b/pkgs/development/libraries/haskell/hakyll/default.nix
index e0b7d4637d5f..c3e10a315722 100644
--- a/pkgs/development/libraries/haskell/hakyll/default.nix
+++ b/pkgs/development/libraries/haskell/hakyll/default.nix
@@ -5,8 +5,8 @@
 
 cabal.mkDerivation (self: {
   pname = "hakyll";
-  version = "3.4.2.0";
-  sha256 = "18yqbiw75wjzc48s5v2aisdc5w2q1rkijxa5p4f4i17flif72j2n";
+  version = "3.4.2.1";
+  sha256 = "0h2xs4qwy2lqdg4v7zbzfmkvr411j34fba3dm05skq7d908wjji0";
   buildDepends = [
     binary blazeHtml blazeMarkup citeprocHs cryptohash filepath hamlet
     lrucache mtl pandoc parsec regexBase regexTdfa snapCore snapServer