diff --git a/_episodes/01-tooling.md b/_episodes/01-tooling.md
index e6080b6d8f68522dfb6ced2bd7e97049c90722be..259162e92878e9f310270ade37897d0940a5073b 100644
--- a/_episodes/01-tooling.md
+++ b/_episodes/01-tooling.md
@@ -130,7 +130,7 @@ so that `make serve` previews the generated site at <http://127.0.0.1:4000/>.
 ## Collections
 
 If several Markdown files are stored in a directory whose name begins with an underscore,
-[Jekyll][jekyll] creates a [collection][jeyll-collection] for them.
+[Jekyll][jekyll] creates a [collection][jekyll-collection] for them.
 We rely on this for both lesson episodes (stored in `_episodes`)
 and extra files (stored in `_extras`).
 For example,