diff --git a/cmd/flux/bootstrap_git.go b/cmd/flux/bootstrap_git.go
index 494e1fd3..c71338ac 100644
--- a/cmd/flux/bootstrap_git.go
+++ b/cmd/flux/bootstrap_git.go
@@ -18,6 +18,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/url"
 	"os"
@@ -38,6 +39,7 @@ import (
 	"github.com/fluxcd/flux2/v2/pkg/manifestgen/install"
 	"github.com/fluxcd/flux2/v2/pkg/manifestgen/sourcesecret"
 	"github.com/fluxcd/flux2/v2/pkg/manifestgen/sync"
+	"github.com/mattn/go-isatty"
 )
 
 var bootstrapGitCmd = &cobra.Command{
@@ -382,6 +384,7 @@ func getAuthOpts(u *url.URL, caBundle []byte) (*git.AuthOptions, error) {
 }
 
 func promptPublicKey(ctx context.Context, secret corev1.Secret, _ sourcesecret.Options) error {
+	logger.Actionf("requesting to grant key access to repository")
 	ppk, ok := secret.StringData[sourcesecret.PublicKeySecretKey]
 	if !ok {
 		return nil
@@ -390,6 +393,9 @@ func promptPublicKey(ctx context.Context, secret corev1.Secret, _ sourcesecret.O
 	logger.Successf("public key: %s", strings.TrimSpace(ppk))
 
 	if !gitArgs.silent {
+		if !isatty.IsTerminal(os.Stdout.Fd()) {
+			return errors.New("aborting; not a terminal (use --silent)")
+		}
 		prompt := promptui.Prompt{
 			Label:     "Please give the key access to your repository",
 			IsConfirm: true,
diff --git a/go.mod b/go.mod
index 3710f080..aa8e2e65 100644
--- a/go.mod
+++ b/go.mod
@@ -44,6 +44,7 @@ require (
 	github.com/homeport/dyff v1.10.2
 	github.com/lucasb-eyer/go-colorful v1.2.0
 	github.com/manifoldco/promptui v0.9.0
+	github.com/mattn/go-isatty v0.0.20
 	github.com/mattn/go-shellwords v1.0.12
 	github.com/notaryproject/notation-go v1.3.2
 	github.com/olekukonko/tablewriter v0.0.5
@@ -179,7 +180,6 @@ require (
 	github.com/mailru/easyjson v0.9.0 // indirect
 	github.com/mattn/go-ciede2000 v0.0.0-20170301095244-782e8c62fec3 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-runewidth v0.0.16 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/go-homedir v1.1.0 // indirect