diff --git a/source/_docs/ecosystem/notebooks/graph.markdown b/source/_docs/ecosystem/notebooks/graph.markdown
index 4fda74e239a..ca17727cd6b 100644
--- a/source/_docs/ecosystem/notebooks/graph.markdown
+++ b/source/_docs/ecosystem/notebooks/graph.markdown
@@ -10,4 +10,4 @@ footer: true
 redirect_from: /ecosystem/notebooks/graph/
 ---
 
-For graphing this [Jupyter notebook](ha_external_link: http://nbviewer.jupyter.org/github/home-assistant/home-assistant-notebooks/blob/master/graph-single-sensor.ipynb) should get you started.
+For graphing this [Jupyter notebook](http://nbviewer.jupyter.org/github/home-assistant/home-assistant-notebooks/blob/master/graph-single-sensor.ipynb) should get you started.