diff --git a/lectures/_toc.yml b/lectures/_toc.yml
index 46bc299f..401c596c 100644
--- a/lectures/_toc.yml
+++ b/lectures/_toc.yml
@@ -97,7 +97,7 @@ parts:
   - file: os_time_iter
   - file: os_egm
   - file: os_egm_jax
-- caption: 家庭问题
+- caption: 收入波动问题
   numbered: true
   chapters:
   - file: ifp_discrete