diff --git a/pkgs/development/python-modules/fiona/default.nix b/pkgs/development/python-modules/fiona/default.nix
index 1fe53065d9ee..8513c723bf00 100644
--- a/pkgs/development/python-modules/fiona/default.nix
+++ b/pkgs/development/python-modules/fiona/default.nix
@@ -2,8 +2,9 @@
 , buildPythonPackage
 , pythonOlder
 , fetchFromGitHub
-, cython
+, cython_3
 , gdal
+, oldest-supported-numpy
 , setuptools
 , wheel
 , attrs
@@ -20,8 +21,8 @@
 
 buildPythonPackage rec {
   pname = "fiona";
-  version = "1.9.4.post1";
-  format = "pyproject";
+  version = "1.9.5";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -29,21 +30,13 @@ buildPythonPackage rec {
     owner = "Toblerity";
     repo = "Fiona";
     rev = "refs/tags/${version}";
-    hash = "sha256-CeGdWAmWteVtL0BoBQ1sB/+1AWkmxogtK99bL5Fpdbw=";
+    hash = "sha256-fq/BuyzuK4iOxdpE4h+KRH0CxOEk/wdmbb9KgCfJ1cw=";
   };
 
-  postPatch = ''
-    # Remove after https://github.com/Toblerity/Fiona/pull/1225 is released
-    sed -i '/"oldest-supported-numpy"/d' pyproject.toml
-
-    # Remove after https://github.com/Toblerity/Fiona/pull/1281 is released,
-    # after which cython also needs to be updated to cython_3
-    sed -i 's/Cython~=/Cython>=/' pyproject.toml
-  '';
-
   nativeBuildInputs = [
-    cython
+    cython_3
     gdal # for gdal-config
+    oldest-supported-numpy
     setuptools
     wheel
   ];