diff --git a/book/src/SUMMARY.md b/book/src/SUMMARY.md
index 1e6252f..b29fe44 100644
--- a/book/src/SUMMARY.md
+++ b/book/src/SUMMARY.md
@@ -37,6 +37,8 @@
 - [Wire format](wire-format/index.md)
 - [Compiler]()
 - [Generators]()
+  - [Rust]()
+  - [Go]()
 
 ---