diff --git a/pkgs/development/python-modules/nbconflux/default.nix b/pkgs/development/python-modules/nbconflux/default.nix
index 9a6eae1e713d..3c1809fc25e3 100644
--- a/pkgs/development/python-modules/nbconflux/default.nix
+++ b/pkgs/development/python-modules/nbconflux/default.nix
@@ -2,11 +2,14 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  bleach,
+  html5lib,
   nbconvert,
   pytestCheckHook,
   requests,
   responses,
   setuptools,
+  traitlets,
   versioneer,
 }:
 
@@ -28,8 +31,11 @@ buildPythonPackage rec {
   ];
 
   dependencies = [
+    bleach
+    html5lib
     nbconvert
     requests
+    traitlets
   ];
 
   nativeCheckInputs = [