diff --git a/pkgs/development/python-modules/cairosvg/default.nix b/pkgs/development/python-modules/cairosvg/default.nix
index 68b1924e5a86..abaabb24b4d9 100644
--- a/pkgs/development/python-modules/cairosvg/default.nix
+++ b/pkgs/development/python-modules/cairosvg/default.nix
@@ -1,18 +1,28 @@
-{ stdenv, buildPythonPackage, fetchPypi, isPy3k
+{ stdenv, buildPythonPackage, fetchPypi, isPy3k, fetchpatch
 , cairocffi, cssselect2, defusedxml, pillow, tinycss2
 , pytestrunner, pytestcov, pytest-flake8, pytest-isort }:
 
 buildPythonPackage rec {
   pname = "CairoSVG";
-  version = "2.1.3";
+  version = "2.2.1";
 
   disabled = !isPy3k;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "e512f555f576b6462b04b585c4ba4c09a43f3a8fec907b60ead21d7d00c550e9";
+    sha256 = "93c5b3204478c4e20c4baeb33807db5311b4420c21db2f21034a6deda998cb14";
   };
 
+  patches = [
+    # Fix tests. Remove with the next release
+    (fetchpatch {
+      url = https://github.com/Kozea/CairoSVG/commit/1f403ad229f0e2782d6427a79f0fbeb6b76148b6.patch;
+      sha256 = "1dxpj5zh8wmx9f8pj11hrixd5jlaqq5xlcdnbl462bh29zj18l26";
+    })
+  ];
+
+  LC_ALL="en_US.UTF-8";
+
   propagatedBuildInputs = [ cairocffi cssselect2 defusedxml pillow tinycss2 ];
 
   checkInputs = [ pytestrunner pytestcov pytest-flake8 pytest-isort ];