diff --git a/pkgs/development/python-modules/graphviz/default.nix b/pkgs/development/python-modules/graphviz/default.nix
index 2fa10120c18c..1fd0db3a5f70 100644
--- a/pkgs/development/python-modules/graphviz/default.nix
+++ b/pkgs/development/python-modules/graphviz/default.nix
@@ -16,7 +16,7 @@
 
 buildPythonPackage rec {
   pname = "graphviz";
-  version = "0.20";
+  version = "0.20.1";
 
   disabled = pythonOlder "3.7";
 
@@ -25,7 +25,7 @@ buildPythonPackage rec {
     owner = "xflr6";
     repo = "graphviz";
     rev = version;
-    hash = "sha256-QyZwXxRbcMushxh/Ypy+v4FOTM4H1u5b7IZMSVgLyEs=";
+    hash = "sha256-plhWG9mE9DoTMg7mWCvFLAgtBx01LAgJ0gQ/mqBU3yc=";
   };
 
   patches = [