diff --git a/pkgs/development/python-modules/commonmark/default.nix b/pkgs/development/python-modules/commonmark/default.nix
index 93eb0327286..0f381d50261 100644
--- a/pkgs/development/python-modules/commonmark/default.nix
+++ b/pkgs/development/python-modules/commonmark/default.nix
@@ -2,11 +2,11 @@
 
 buildPythonPackage rec {
   pname = "commonmark";
-  version = "0.8.1";
+  version = "0.9.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "abcbc854e0eae5deaf52ae5e328501b78b4a0758bf98ac8bb792fce993006084";
+    sha256 = "452f9dc859be7f06631ddcb328b6919c67984aca654e5fefb3914d54691aed60";
   };
 
   preCheck = ''