diff --git a/books/projectinca/SUMMARY.md b/books/projectinca/SUMMARY.md
index 1fa1d34..f2ea33a 100644
--- a/books/projectinca/SUMMARY.md
+++ b/books/projectinca/SUMMARY.md
@@ -53,7 +53,7 @@
   - [Storage Blocks](tfgrid4/storageblock.md)
 - [Project Info](projectinca/proj_info.md)
   - [About us](tfgrid3/who_are_we.md)
-  - [Utilization](partners_utilization/)
+  - [Utilization](partners_utilization/partners.md)
   - [The Internet today](tech/internet_today.md)
     - [history c64](tech/history/c64.md)
     - [too many layers](tech/history/layers.md)