diff --git a/docs/source/spawners.md b/docs/source/spawners.md
index c6544d05..ee294107 100644
--- a/docs/source/spawners.md
+++ b/docs/source/spawners.md
@@ -165,4 +165,4 @@ When `Spawner.start` is called, this dictionary is accessible as `self.user_opti
 
 ## Writing a custom spawner
 
-If you are interested in building a custom spawner, you can read [this tutorial](http://jupyterhub-tutorial.readthedocs.io/en/latest/spawners.html)
+If you are interested in building a custom spawner, you can read [this tutorial](http://jupyterhub-tutorial.readthedocs.io/en/latest/spawners.html).