diff --git a/captcha.go b/captcha.go
index c56a841..1014f24 100644
--- a/captcha.go
+++ b/captcha.go
@@ -8,6 +8,6 @@ import (
 
 type Captcha interface {
 	HttpMiddleware(container *do.Injector) func(next http.Handler) http.Handler
-	Verify(id, answer string, clear bool) bool
+	Verify(id, answer string, clear bool) error
 	Generate(captchaUuid string) (id, answer string)
 }