diff --git a/pkg/captcha/db.go b/pkg/captcha/db.go
index b367e97..37adf4d 100644
--- a/pkg/captcha/db.go
+++ b/pkg/captcha/db.go
@@ -30,8 +30,8 @@ func NewID(additionalData string, answer Answer) ID {
 	return ID(base64.RawURLEncoding.EncodeToString(idHash.Sum(nil)))
 }
 
-// CaptchaDB interface with all necessary methods.
-type CaptchaDB interface {
+// DB interface with all necessary methods.
+type DB interface {
 	New(data string, captcha Captcha) (Captcha, ID)
 	GetExpiry() time.Duration
 	SetExpiry(expiry time.Duration)