diff --git a/lecture/lec15.md b/lecture/lec15.md
index f3458f5..ef665ec 100644
--- a/lecture/lec15.md
+++ b/lecture/lec15.md
@@ -1,6 +1,6 @@
 ---
 layout: page
-title: Lecture 15 - Causal Inference I: Problems with Association
+title: Lecture 15 - Causal Inference I
 nav_exclude: true
 ---