diff --git a/changelogs/unreleased/5526-qiuming-best b/changelogs/unreleased/5526-qiuming-best
new file mode 100644
index 0000000000..772f6d4d90
--- /dev/null
+++ b/changelogs/unreleased/5526-qiuming-best
@@ -0,0 +1 @@
+fix restic backup failure with self-signed certification backend storage
diff --git a/pkg/uploader/provider/restic.go b/pkg/uploader/provider/restic.go
index 2715b9e9d2..00fe420571 100644
--- a/pkg/uploader/provider/restic.go
+++ b/pkg/uploader/provider/restic.go
@@ -147,7 +147,9 @@ func (rp *resticProvider) RunBackup(
 	snapshotIdCmd := restic.GetSnapshotCommand(rp.repoIdentifier, rp.credentialsFile, tags)
 	snapshotIdCmd.Env = rp.cmdEnv
 	snapshotIdCmd.CACertFile = rp.caCertFile
-
+	if len(rp.extraFlags) != 0 {
+		snapshotIdCmd.ExtraFlags = append(snapshotIdCmd.ExtraFlags, rp.extraFlags...)
+	}
 	snapshotID, err := restic.GetSnapshotID(snapshotIdCmd)
 	if err != nil {
 		return "", false, errors.WithStack(fmt.Errorf("error getting snapshot id with error: %v", err))