diff --git a/pkgs/development/python-modules/bson/default.nix b/pkgs/development/python-modules/bson/default.nix
index c7fc3443f7c5..2bb2f11738fd 100644
--- a/pkgs/development/python-modules/bson/default.nix
+++ b/pkgs/development/python-modules/bson/default.nix
@@ -2,28 +2,44 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  fetchpatch,
+  setuptools,
   python-dateutil,
   six,
   pytestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "bson";
   version = "0.5.10";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "py-bson";
     repo = "bson";
-    tag = version;
+    tag = finalAttrs.version;
     hash = "sha256-mirRpo27RoOBlwxVOKnHaDIzJOErp7c2VxCOunUm/u4=";
   };
 
-  postPatch = ''
-    find . -type f -name '*.py' -exec sed -i 's|assertEquals|assertEqual|g' {} +
-  '';
+  patches = [
+    # Upstream PR: https://github.com/py-bson/bson/pull/113
+    (fetchpatch {
+      name = "python-3.11.patch";
+      url = "https://github.com/py-bson/bson/commit/5346e73124de8a1f9e2a1960501416529e4cee02.patch";
+      hash = "sha256-kNs00j/FDjb2av+0WMORrCo75NcuaJXUl4SbYlksnfo=";
+    })
+    # Upstream PR: https://github.com/py-bson/bson/pull/140
+    (fetchpatch {
+      name = "python-3.14.patch";
+      url = "https://github.com/py-bson/bson/commit/4e6b4c206f7204034ef74bff8ae84a95d76d1684.patch";
+      includes = [ "setup.py" ];
+      hash = "sha256-JOmW/KMqzFdXKH4TMR/PG1YU3SvLTBc3L3E9kXag3bQ=";
+    })
+  ];
 
-  propagatedBuildInputs = [
+  build-system = [ setuptools ];
+
+  dependencies = [
     python-dateutil
     six
   ];
@@ -35,7 +51,10 @@ buildPythonPackage rec {
   meta = {
     description = "BSON codec for Python";
     homepage = "https://github.com/py-bson/bson";
-    license = lib.licenses.asl20;
+    license = [
+      lib.licenses.asl20
+      lib.licenses.bsd3
+    ];
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})