diff --git a/pkgs/development/python-modules/firedrake/default.nix b/pkgs/development/python-modules/firedrake/default.nix
index 9318a4c8bd1d..93dba808c5ca 100644
--- a/pkgs/development/python-modules/firedrake/default.nix
+++ b/pkgs/development/python-modules/firedrake/default.nix
@@ -57,21 +57,21 @@ let
 in
 buildPythonPackage rec {
   pname = "firedrake";
-  version = "2025.4.1";
+  version = "2025.4.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "firedrakeproject";
     repo = "firedrake";
     tag = version;
-    hash = "sha256-p/yquIKWynGY7UESDNBCf1cM8zpy8beuuRxSrSMvj7c=";
+    hash = "sha256-bAGmXoHPAdMYJMMQYVq98LYro1Vd+o9pfvXC3BsQUf0=";
   };
 
   postPatch =
     # relax build-dependency petsc4py
     ''
       substituteInPlace pyproject.toml --replace-fail \
-        "petsc4py==3.23.3" "petsc4py"
+        "petsc4py==3.23.4" "petsc4py"
     ''
     + lib.optionalString stdenv.hostPlatform.isLinux ''
       substituteInPlace firedrake/petsc.py --replace-fail \