diff --git a/pkgs/development/python-modules/blosc2/default.nix b/pkgs/development/python-modules/blosc2/default.nix
index db948e8098bc..f72a50eb26d3 100644
--- a/pkgs/development/python-modules/blosc2/default.nix
+++ b/pkgs/development/python-modules/blosc2/default.nix
@@ -19,6 +19,7 @@
   # propagates
   msgpack,
   ndindex,
+  numexpr,
   numpy,
   py-cpuinfo,
   rich,
@@ -31,21 +32,25 @@
 
 buildPythonPackage rec {
   pname = "blosc2";
-  version = "2.5.1";
+  version = "2.7.1";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "Blosc";
     repo = "python-blosc2";
     rev = "refs/tags/v${version}";
-    hash = "sha256-yBgnNJU1q+FktIkpQn74LuRP19Ta/fNC60Z8TxzlWPk=";
+    hash = "sha256-2aLfyd+/I8cy9OqdU4yNXY/bkf0AdXu+hZPLDdM3g5g=";
   };
 
   postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace-fail "numpy>=2.0.0" "numpy"
     substituteInPlace requirements-runtime.txt \
       --replace "pytest" ""
   '';
 
+  pythonRelaxDeps = [ "numpy" ];
+
   nativeBuildInputs = [
     cmake
     cython
@@ -65,6 +70,7 @@ buildPythonPackage rec {
   propagatedBuildInputs = [
     msgpack
     ndindex
+    numexpr
     numpy
     py-cpuinfo
     rich