diff --git a/requirements.txt b/requirements.txt
index 6d30c71..ab1f016 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -156,6 +156,7 @@ jinja2-time==0.2.0
 joblib @ file:///home/conda/feedstock_root/build_artifacts/joblib_1589812474002/work
 json5 @ file:///home/conda/feedstock_root/build_artifacts/json5_1591810480056/work
 jsonschema==3.2.0
+JSSEnv==1.0.0
 jupyter==1.0.0
 jupyter-aihub-deploy-extension @ file:///opt/conda/conda-bld/dlenv-base_1593468110918/work/packages/aihub/jupyter_aihub_deploy_extension
 jupyter-client==6.1.3