diff --git a/docs/readthedocs/source/doc/UserGuide/docker.md b/docs/readthedocs/source/doc/UserGuide/docker.md
index 504ad543..a1170a5b 100644
--- a/docs/readthedocs/source/doc/UserGuide/docker.md
+++ b/docs/readthedocs/source/doc/UserGuide/docker.md
@@ -80,6 +80,7 @@ After a Docker container is launched and user login into the container, you can
 
 In the `/opt/work` directory, run this command line to start the Jupyter Notebook service:
 ```
+source activate bigdl
 ./start-notebook.sh
 ```