diff --git a/pkgs/development/python-modules/m2r/default.nix b/pkgs/development/python-modules/m2r/default.nix
index 942699156a93..02dd3c540ac4 100644
--- a/pkgs/development/python-modules/m2r/default.nix
+++ b/pkgs/development/python-modules/m2r/default.nix
@@ -9,11 +9,11 @@
 
 buildPythonPackage rec {
   pname = "m2r";
-  version = "0.2.1";
+  version = "0.3.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "bf90bad66cda1164b17e5ba4a037806d2443f2a4d5ddc9f6a5554a0322aaed99";
+    sha256 = "sha256-qvtn/EnPsdieRqNEOsdH4V9LtC3yDtBPBnrZ777iVqs=";
   };
 
   patches = [