diff --git a/plugins/by-name/molten/default.nix b/plugins/by-name/molten/default.nix
index aa482e14..5e843812 100644
--- a/plugins/by-name/molten/default.nix
+++ b/plugins/by-name/molten/default.nix
@@ -224,6 +224,7 @@ mkVimPlugin {
           cairosvg
           ipython
           nbformat
+          ipykernel
         ];
       defaultText = literalExpression ''
         p: with p; [
@@ -232,6 +233,7 @@ mkVimPlugin {
           cairosvg
           ipython
           nbformat
+          ipykernel
         ]
       '';
       description = "Python packages to add to the `PYTHONPATH` of neovim.";