diff --git a/src/content/classnotes/expressjs/validation/index.mdx b/src/content/classnotes/expressjs/validation/index.mdx
index 0dd31bd..dd6ff3c 100644
--- a/src/content/classnotes/expressjs/validation/index.mdx
+++ b/src/content/classnotes/expressjs/validation/index.mdx
@@ -97,10 +97,10 @@ $ npm install zod
 
 <CodePreview src="/codes/expressjs/invest-app-validation/public/js/signup.js" />
 
-![](/lp2/imgs/expressjs/validation/signup-invalid.png)
+![](/lp2/imgs/expressjs/validation/signin-invalid.png)
 
-<CodePreview src="/codes/expressjs/invest-app-validation/public/signup.html" />
+<CodePreview src="/codes/expressjs/invest-app-validation/public/signin.html" />
 
-<CodePreview src="/codes/expressjs/invest-app-validation/public/js/signup.js" />
+<CodePreview src="/codes/expressjs/invest-app-validation/public/js/signin.js" />