diff --git a/pkgs/by-name/mm/mmdoc/package.nix b/pkgs/by-name/mm/mmdoc/package.nix
index dd09c19978ec..c9e678bdb646 100644
--- a/pkgs/by-name/mm/mmdoc/package.nix
+++ b/pkgs/by-name/mm/mmdoc/package.nix
@@ -13,13 +13,13 @@
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "mmdoc";
-  version = "0.20.0";
+  version = "0.21.0";
 
   src = fetchFromGitHub {
     owner = "ryantm";
     repo = "mmdoc";
     rev = finalAttrs.version;
-    hash = "sha256-NS8i5xvCwq0pSdfxnaxnpuwmDAkfH6Tkc4N2F6aGvWY=";
+    hash = "sha256-GxGYW10GZvDzeeKy9U9iyGvfN3IM/A/pnQivx8xXhHI=";
   };
 
   nativeBuildInputs = [