diff --git a/pkgs/development/python-modules/xml2rfc/default.nix b/pkgs/development/python-modules/xml2rfc/default.nix
index d7d5b52ee42e..d7cd08ad22b1 100644
--- a/pkgs/development/python-modules/xml2rfc/default.nix
+++ b/pkgs/development/python-modules/xml2rfc/default.nix
@@ -26,7 +26,7 @@
 
 buildPythonPackage rec {
   pname = "xml2rfc";
-  version = "3.14.2";
+  version = "3.15.0";
 
   disabled = pythonOlder "3.6";
 
@@ -34,19 +34,15 @@ buildPythonPackage rec {
     owner = "ietf-tools";
     repo = "xml2rfc";
     rev = "refs/tags/v${version}";
-    sha256 = "sha256-7UKav9IOH3u/3ZPDWVTBSf+A1li65qK2qASJpNVezdI=";
+    sha256 = "sha256-sCpV4pmBIBFxFpDK7H9riQ+0174xCn6uVztGDAEeoII=";
   };
 
   postPatch = ''
     substituteInPlace Makefile \
       --replace "SHELL := /bin/bash" "SHELL := bash" \
-      --replace "test flaketest" "test" \
-      --replace "python setup.py --quiet install" ""
+      --replace "test flaketest" "test"
     substituteInPlace setup.py \
       --replace "'tox'," ""
-    substituteInPlace requirements.txt \
-      --replace "jinja2>=2.11,<3.0" "jinja2" \
-      --replace "markupsafe==2.0.1" "markupsafe"
   '';
 
   propagatedBuildInputs = [