diff --git a/pkgs/development/python-modules/firedrake-fiat/default.nix b/pkgs/development/python-modules/firedrake-fiat/default.nix
index 412077919710..5255fa695da8 100644
--- a/pkgs/development/python-modules/firedrake-fiat/default.nix
+++ b/pkgs/development/python-modules/firedrake-fiat/default.nix
@@ -16,14 +16,14 @@
 
 buildPythonPackage rec {
   pname = "firedrake-fiat";
-  version = "2025.4.1";
+  version = "2025.4.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "firedrakeproject";
     repo = "fiat";
     tag = version;
-    hash = "sha256-rN2JPXsauyBF6X2378kOmqHNB+1EqxiGnDaVoEXy4vw=";
+    hash = "sha256-SIi/4JW9L4kyFxEmbG9pqe0QtY80UMOh7LSFLmrHhZY=";
   };
 
   postPatch =