diff --git a/.gitignore b/.gitignore
index 34977ee..59280bc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 node_modules
-.idea
\ No newline at end of file
+.idea
+# Demo / scratch notebooks must not be committed.
+*.ipynb
+.ipynb_checkpoints/