diff --git a/src/components/auth/register-form.tsx b/src/components/auth/register-form.tsx
index 6ca0018..5eab48c 100644
--- a/src/components/auth/register-form.tsx
+++ b/src/components/auth/register-form.tsx
@@ -50,11 +50,14 @@ export function RegisterForm() {
       return
     }
 
+    // Use configured APP_URL to include basePath in redirect
+    const appUrl = process.env.NEXT_PUBLIC_APP_URL || window.location.origin
+
     const { error: signUpError } = await supabase.auth.signUp({
       email,
       password,
       options: {
-        emailRedirectTo: `${window.location.origin}/auth/callback`,
+        emailRedirectTo: `${appUrl}/auth/callback/`,
       }
     })