diff --git a/url.go b/url.go
index 4d87fa64..46e9ae88 100644
--- a/url.go
+++ b/url.go
@@ -12,8 +12,11 @@ import (
 // Convert SCP-like URL to SSH URL(e.g. [user@]host.xz:path/to/repo.git/)
 // ref. http://git-scm.com/docs/git-fetch#_git_urls
 // (golang hasn't supported Perl-like negative look-behind match)
-var hasSchemePattern = regexp.MustCompile("^[^:]+://")
-var scpLikeUrlPattern = regexp.MustCompile("^([^@]+@)?([^:]+):/?(.+)$")
+var (
+	hasSchemePattern          = regexp.MustCompile("^[^:]+://")
+	scpLikeUrlPattern         = regexp.MustCompile("^([^@]+@)?([^:]+):/?(.+)$")
+	looksLikeAuthorityPattern = regexp.MustCompile(`[A-Za-z0-9]\.[A-Za-z]+(?::\d{1,5})?`)
+)
 
 func NewURL(ref string) (*url.URL, error) {
 	if !hasSchemePattern.MatchString(ref) && scpLikeUrlPattern.MatchString(ref) {
@@ -36,6 +39,12 @@ func NewURL(ref string) (*url.URL, error) {
 			if err != nil {
 				return url, err
 			}
+		} else if url.Host == "" {
+			// If ref is like "github.com/motemen/ghq" consider it as "https://github.com/motemen/ghq"
+			paths := strings.Split(ref, "/")
+			if looksLikeAuthorityPattern.MatchString(paths[0]) {
+				return url.Parse("https://" + ref)
+			}
 		}
 		url.Scheme = "https"
 		url.Host = "github.com"
diff --git a/url_test.go b/url_test.go
index 37317d80..4d61ebdf 100644
--- a/url_test.go
+++ b/url_test.go
@@ -1,10 +1,11 @@
 package main
 
 import (
-	. "github.com/onsi/gomega"
 	"net/url"
 	"os"
 	"testing"
+
+	. "github.com/onsi/gomega"
 )
 
 func TestNewURL(t *testing.T) {
@@ -37,6 +38,16 @@ func TestNewURL(t *testing.T) {
 	Expect(differentNameRepository.Host).To(Equal("github.com"))
 	Expect(err).To(BeNil())
 
+	withAuthorityRepository, err := NewURL("github.com/motemen/gore")
+	Expect(withAuthorityRepository.String()).To(Equal("https://github.com/motemen/gore"))
+	Expect(withAuthorityRepository.Host).To(Equal("github.com"))
+	Expect(err).To(BeNil())
+
+	withAuthorityRepository2, err := NewURL("golang.org/x/crypto")
+	Expect(withAuthorityRepository2.String()).To(Equal("https://golang.org/x/crypto"))
+	Expect(withAuthorityRepository2.Host).To(Equal("golang.org"))
+	Expect(err).To(BeNil())
+
 	os.Setenv("GITHUB_USER", "ghq-test")
 	sameNameRepository, err := NewURL("same-name-ghq")
 	Expect(sameNameRepository.String()).To(Equal("https://github.com/ghq-test/same-name-ghq"))