diff --git a/pkgs/development/python-modules/pycapnp/default.nix b/pkgs/development/python-modules/pycapnp/default.nix
index d0d460762cb9..2a60d3958e18 100644
--- a/pkgs/development/python-modules/pycapnp/default.nix
+++ b/pkgs/development/python-modules/pycapnp/default.nix
@@ -3,7 +3,6 @@
   buildPythonPackage,
   replaceVars,
   fetchFromGitHub,
-  fetchpatch2,
   setuptools,
   wheel,
   capnproto,
@@ -15,14 +14,14 @@
 
 buildPythonPackage rec {
   pname = "pycapnp";
-  version = "2.0.0";
+  version = "2.2.2";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "capnproto";
     repo = "pycapnp";
     tag = "v${version}";
-    hash = "sha256-SVeBRJMMR1Z8+S+QoiUKGRFGUPS/MlmWLi1qRcGcPoE=";
+    hash = "sha256-oRgO/FuNxNMSUla+jIypD/dAvFi27TkEfCHbqovhq9I=";
   };
 
   patches = [
@@ -36,11 +35,6 @@ buildPythonPackage rec {
     # other than the builtin schemas (based on quick GitHub code search), so I don't
     # think it's worthwhile.
     (replaceVars ./include-paths.patch { inherit capnproto; })
-    (fetchpatch2 {
-      name = "cython-3.patch";
-      url = "https://github.com/capnproto/pycapnp/pull/334.diff?full_index=1";
-      hash = "sha256-we7v4RaL7c1tePWl+oYfzMHAfnvnpdMkQgVu9YLwC6Y=";
-    })
   ];
 
   build-system = [
@@ -69,7 +63,7 @@ buildPythonPackage rec {
   meta = {
     description = "Cython wrapping of the C++ Cap'n Proto library";
     homepage = "https://capnproto.github.io/pycapnp/";
-    changelog = "https://github.com/capnproto/pycapnp/blob/${src.rev}/CHANGELOG.md";
+    changelog = "https://github.com/capnproto/pycapnp/blob/${src.tag}/CHANGELOG.md";
     license = lib.licenses.bsd2;
     maintainers = with lib.maintainers; [ Liamolucko ];
   };