diff --git a/pkg/captcha/captcha.go b/pkg/captcha/captcha.go
index 8193e0c..c5bc4fe 100644
--- a/pkg/captcha/captcha.go
+++ b/pkg/captcha/captcha.go
@@ -45,7 +45,7 @@ type BaseCaptcha struct {
 
 func NewBaseCaptcha(expiry time.Duration) *BaseCaptcha {
 	return &BaseCaptcha{
-		expiry: ExpiryDate(expiry),
+		expiry: time.Now().Add(expiry),
 	}
 }
 
@@ -72,9 +72,3 @@ func (c *BaseCaptcha) IsSolved() bool {
 func (c *BaseCaptcha) Expiry() time.Time {
 	return c.expiry
 }
-
-// ExpiryDate returns a date when CAPTCHA expires. It adds a passed
-// expiry duration to a current time.
-func ExpiryDate(expiry time.Duration) time.Time {
-	return time.Now().Add(expiry)
-}