diff --git a/Chapters/5-Optimization/INDEX.md b/Chapters/5-Optimization/INDEX.md
index b9e9928..3a9113e 100644
--- a/Chapters/5-Optimization/INDEX.md
+++ b/Chapters/5-Optimization/INDEX.md
@@ -288,7 +288,8 @@ $$
                 {\sqrt{G^{(k+1)} + \epsilon}}
     \end{aligned}
 $$
-> 
+
+> [!NOTE]
 > In other words, compute the gradient and scale it for the sum of its squares
 > until that point