diff --git a/pkgs/development/python-modules/nbconvert/default.nix b/pkgs/development/python-modules/nbconvert/default.nix
index ab91f22acc44..8604698cc2a2 100644
--- a/pkgs/development/python-modules/nbconvert/default.nix
+++ b/pkgs/development/python-modules/nbconvert/default.nix
@@ -23,11 +23,11 @@
 
 buildPythonPackage rec {
   pname = "nbconvert";
-  version = "6.4.0";
+  version = "6.4.2";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "5412ec774c6db4fccecb8c4ba07ec5d37d6dcf5762593cb3d6ecbbeb562ebbe5";
+    sha256 = "sha256-6ygD2xj2+szmvzsBtoT+R5B5lL0VbRXqzN8BHj1/gWQ=";
   };
 
   # Add $out/share/jupyter to the list of paths that are used to search for