diff --git a/docs/Instruction/week09.md b/docs/Instruction/week09.md
index 80658549771a94a825a2445718e7e87fc501cf07..7af726b1926b654bd78044ba33f88baceda018d0 100644
--- a/docs/Instruction/week09.md
+++ b/docs/Instruction/week09.md
@@ -29,8 +29,8 @@
 
 [![](./images/week09/WS2812.png){width=200}](https://akizukidenshi.com/catalog/g/gI-07915/)
 ![](./images/week09/WS2812_sch.png){width=200}  
-C1 104 = 100nF = 0.1uF
-Ref. [https://www.newark.com/uf-nf-pf-capacitor-conversion-table](https://www.newark.com/uf-nf-pf-capacitor-conversion-table) 
+C1 104 = 100nF = 0.1uF  
+Ref. [uf-nf-pf-capacitor-conversion-table](https://www.newark.com/uf-nf-pf-capacitor-conversion-table)  
 ![](./images/week09/neopixel.png){width=200}