diff --git a/pkgs/development/python-modules/xml2rfc/default.nix b/pkgs/development/python-modules/xml2rfc/default.nix
index 28c9a856b3f8..5a9b839c3b57 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 = "3.15.1";
+  version = "3.15.3";
 
   disabled = pythonOlder "3.6";
 
@@ -34,7 +34,7 @@ buildPythonPackage rec {
     owner = "ietf-tools";
     repo = "xml2rfc";
     rev = "refs/tags/v${version}";
-    sha256 = "sha256-/0Y49ZSaPM3IAFJGmWKiKD+mziA0LYQ3fvGFrkPkl9Y=";
+    sha256 = "sha256-kA6Ali5zFEwe4iGpSSabUfNoaqY9/dxLyG+SccA94zc=";
   };
 
   postPatch = ''