diff --git a/docs/reference/index.md b/docs/reference/index.md
index 57004ec2e..f10aa4f23 100644
--- a/docs/reference/index.md
+++ b/docs/reference/index.md
@@ -5,4 +5,5 @@ The reference provides background knowledge for working with ehrQL in your proje
 * [Backends](backends.md)
 * [Table schemas](schemas.md)
 * [Command line interface](cli.md)
-* [Cheatsheet](cheatsheet.md)
\ No newline at end of file
+* [Cheatsheet](cheatsheet.md)
+* [Upgrading ehrQL from v0 to v1](upgrading-ehrql-from-v0-to-v1.md)