diff --git a/internal/captcha/dwelling_captcha.go b/internal/captcha/dwelling_captcha.go
index 7ec1b90..3f39882 100644
--- a/internal/captcha/dwelling_captcha.go
+++ b/internal/captcha/dwelling_captcha.go
@@ -20,8 +20,7 @@ type DwellingCaptcha struct {
 
 func NewDwellingCaptcha(expiry time.Duration) *DwellingCaptcha {
 	return &DwellingCaptcha{
-		BaseCaptcha: captcha.BaseCaptcha{
-			ExpireIn: captcha.ExpiryDate(expiry)}}
+		BaseCaptcha: *captcha.NewBaseCaptcha(expiry)}
 }
 
 func (c *DwellingCaptcha) Image(style string) *image.Image {