diff --git a/pkgs/development/libraries/proj/default.nix b/pkgs/development/libraries/proj/default.nix
index 0a0ae87dc628..8fedba3ef08c 100644
--- a/pkgs/development/libraries/proj/default.nix
+++ b/pkgs/development/libraries/proj/default.nix
@@ -16,13 +16,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "proj";
-  version = "9.4.0";
+  version = "9.4.1";
 
   src = fetchFromGitHub {
     owner = "OSGeo";
     repo = "PROJ";
     rev = finalAttrs.version;
-    hash = "sha256-m8u5+uWeXI2lxxsTcVJbvCiV30CQifw4reAY3GHHavA=";
+    hash = "sha256-sLlG9NNHST9d0G5hV1tOGpTSv4rbUxERW3kwGC+t1iU=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/pyproj/default.nix b/pkgs/development/python-modules/pyproj/default.nix
index f76fd0e0f4f5..4b3a6fedd030 100644
--- a/pkgs/development/python-modules/pyproj/default.nix
+++ b/pkgs/development/python-modules/pyproj/default.nix
@@ -2,17 +2,18 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  python,
-  proj,
+  fetchpatch,
+  pytestCheckHook,
   pythonOlder,
   substituteAll,
-  cython,
-  pytestCheckHook,
-  mock,
+
   certifi,
+  cython,
+  mock,
   numpy,
-  shapely,
   pandas,
+  proj,
+  shapely,
   xarray,
 }:
 
@@ -36,6 +37,12 @@ buildPythonPackage rec {
       proj = proj;
       projdev = proj.dev;
     })
+
+    # fix test failure caused by update of EPSG DB
+    (fetchpatch {
+      url = "https://github.com/pyproj4/pyproj/commit/3f7c7e5bcec33d9b2f37ceb03c484ea318dff3ce.patch";
+      hash = "sha256-0J8AlInuhFDAYIBJAJ00XbqIanJY/D8xPVwlOapmLDE=";
+    })
   ];
 
   nativeBuildInputs = [ cython ];
@@ -44,11 +51,11 @@ buildPythonPackage rec {
   propagatedBuildInputs = [ certifi ];
 
   nativeCheckInputs = [
-    pytestCheckHook
     mock
     numpy
-    shapely
     pandas
+    pytestCheckHook
+    shapely
     xarray
   ];