diff --git a/jwt/login.go b/jwt/login.go
index 7db743e..b0d5144 100644
--- a/jwt/login.go
+++ b/jwt/login.go
@@ -45,9 +45,9 @@ func (tv *TokenVerifier) CreateToken(user *postgres.User) (string, error) {
 }
 
 var (
-	ErrUnexpectedSigningMethod = fmt.Errorf("Unexpected signing method")
-	ErrInvalidToken            = fmt.Errorf("Token is invalid")
-	ErrTokenExpired            = fmt.Errorf("Token has expired")
+	ErrUnexpectedSigningMethod = fmt.Errorf("unexpected signing method")
+	ErrInvalidToken            = fmt.Errorf("token is invalid")
+	ErrTokenExpired            = fmt.Errorf("token has expired")
 )
 
 // VerifyToken verifys a given string-token