diff --git a/cmd/gitsemver/gitsemver.go b/cmd/gitsemver/gitsemver.go
index 52406e3..93b86d9 100644
--- a/cmd/gitsemver/gitsemver.go
+++ b/cmd/gitsemver/gitsemver.go
@@ -21,10 +21,21 @@ var bumpCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 		project := newProjectOrPanic(cmd)
 		versionFilenamesAndKeys := getVersionFilenamesAndKeysOrFail(cmd)
+		username := getUsernameOrFail(cmd)
+		password := getPasswordOrFail(cmd)
 		latest := getLatestVersionOrFail(project)
 		next := getNextVersionOrFail(project)
 
-		if err := project.Bump(versionFilenamesAndKeys); err != nil {
+		var auth gitsemver.AuthMethod = nil
+
+		if username != "" && password != "" {
+			auth = &gitsemver.BasicAuth{
+				Username: username,
+				Password: password,
+			}
+		}
+
+		if err := project.Bump(versionFilenamesAndKeys, auth); err != nil {
 			log.Fatalln(err)
 		}
 
@@ -65,6 +76,8 @@ func init() {
 	rootCmd.PersistentFlags().StringP("project", "p", "", "Project")
 
 	bumpCmd.Flags().StringArrayP("version-file", "f", make([]string, 0), "Specify version files to be updated with the new version in the format `filename:key` (i.e. `package.json:\"version\"`)")
+	bumpCmd.Flags().StringP("username", "u", "", "Username to use in HTTP basic authentication")
+	bumpCmd.Flags().StringP("password", "P", "", "Password to use in HTTP basic authentication")
 }
 
 func newProjectOrPanic(cmd *cobra.Command) *gitsemver.Project {
@@ -112,3 +125,21 @@ func getVersionFilenamesAndKeysOrFail(cmd *cobra.Command) []string {
 
 	return versionFilenamesAndKeys
 }
+
+func getUsernameOrFail(cmd *cobra.Command) string {
+	username, err := cmd.Flags().GetString("username")
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return username
+}
+
+func getPasswordOrFail(cmd *cobra.Command) string {
+	password, err := cmd.Flags().GetString("password")
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return password
+}
diff --git a/internal/git/mod.go b/internal/git/mod.go
index 9060790..d60a310 100644
--- a/internal/git/mod.go
+++ b/internal/git/mod.go
@@ -10,12 +10,15 @@ import (
 	"github.com/go-git/go-git/v5/plumbing"
 	"github.com/go-git/go-git/v5/plumbing/object"
 	"github.com/go-git/go-git/v5/plumbing/storer"
+	"github.com/go-git/go-git/v5/plumbing/transport"
 	"github.com/go-git/go-git/v5/plumbing/transport/http"
 )
 
 type Commit = object.Commit
 type Hash = plumbing.Hash
 type Repository = git.Repository
+type AuthMethod = transport.AuthMethod
+type BasicAuth = http.BasicAuth
 
 func OpenRepository(path string) (*Repository, error) {
 	return git.PlainOpen(path)
@@ -125,7 +128,7 @@ func CreateTag(repo *Repository, name, message string) error {
 	return err
 }
 
-func PushTagsToOrigin(repo *Repository) error {
+func PushTagsToOrigin(repo *Repository, auth AuthMethod) error {
 	// skip pushing if remote doesn't exist
 	if _, err := repo.Remote("origin"); err != nil {
 		return nil
@@ -135,10 +138,7 @@ func PushTagsToOrigin(repo *Repository) error {
 		RemoteName: "origin",
 		Progress:   os.Stdout,
 		RefSpecs:   []config.RefSpec{config.RefSpec("refs/tags/*:refs/tags/*")},
-		Auth: &http.BasicAuth{
-			Username: "git",
-			Password: os.Getenv("GITHUB_TOKEN"),
-		},
+		Auth:       auth,
 	}
 
 	if err := repo.Push(pushOpts); err != nil {
diff --git a/pkg/gitsemver/project.go b/pkg/gitsemver/project.go
index f10ea6c..f97f8ab 100644
--- a/pkg/gitsemver/project.go
+++ b/pkg/gitsemver/project.go
@@ -13,6 +13,8 @@ import (
 
 type Increment int64
 type Change string
+type AuthMethod = git.AuthMethod
+type BasicAuth = git.BasicAuth
 
 const (
 	Major Increment = 4
@@ -215,7 +217,7 @@ func (p *Project) NextVersionIncrement() (Increment, error) {
 	return increment, nil
 }
 
-func (p *Project) Bump(versionFilenamesAndKeys []string) error {
+func (p *Project) Bump(versionFilenamesAndKeys []string, auth AuthMethod) error {
 	latest, err := p.LatestVersion()
 	if err != nil {
 		return err
@@ -251,7 +253,7 @@ func (p *Project) Bump(versionFilenamesAndKeys []string) error {
 		return err
 	}
 
-	if err := git.PushTagsToOrigin(p.Repo()); err != nil {
+	if err := git.PushTagsToOrigin(p.Repo(), auth); err != nil {
 		return err
 	}