diff --git a/docker-compose.yml b/docker-compose.yml
index 611eb6e..d149f79 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -27,6 +27,8 @@ services:
       DOCKER_NETWORK_NAME: ${DOCKER_NETWORK_NAME}
       # JupyterHub will spawn this Notebook image for users
       DOCKER_NOTEBOOK_IMAGE: ${DOCKER_NOTEBOOK_IMAGE}
+      # Notebook directory inside user image
+      DOCKER_NOTEBOOK_DIR: ${DOCKER_NOTEBOOK_DIR}
       # Using this run command (optional)
       DOCKER_SPAWN_CMD: ${DOCKER_SPAWN_CMD}
       # Required to authenticate users using GitHub OAuth