diff --git a/SUMMARY.md b/SUMMARY.md
index 6c2e8d041..92a2932d7 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -45,4 +45,5 @@
    * [Reverse proxy](reverse_proxy.md)
 * [How to contribute?](contributing.md)
 * [Roadmap](roadmap.md)
+* Purchase