diff --git a/pkgs/development/python-modules/ciscoconfparse2/default.nix b/pkgs/development/python-modules/ciscoconfparse2/default.nix
index 218ca589ae61..166eaba86ea4 100644
--- a/pkgs/development/python-modules/ciscoconfparse2/default.nix
+++ b/pkgs/development/python-modules/ciscoconfparse2/default.nix
@@ -35,6 +35,7 @@ buildPythonPackage rec {
     "attrs"
     "hier-config"
     "passlib"
+    "tomlkit"
     "typeguard"
   ];