diff --git a/src/headers.go b/src/headers.go
index bb11be2..7405bcf 100644
--- a/src/headers.go
+++ b/src/headers.go
@@ -100,6 +100,7 @@ func ProcessHeadersFile(ctx context.Context, manifest *Manifest) error {
 	if headersEntry == nil {
 		return nil
 	}
+	manifest.Headers = []*HeaderRule{}
 
 	data, err := GetEntryContents(ctx, headersEntry)
 	if errors.Is(err, ErrNotRegularFile) {
diff --git a/src/redirects.go b/src/redirects.go
index 8a3bd2c..54edcdc 100644
--- a/src/redirects.go
+++ b/src/redirects.go
@@ -104,6 +104,7 @@ func ProcessRedirectsFile(ctx context.Context, manifest *Manifest) error {
 	if redirectsEntry == nil {
 		return nil
 	}
+	manifest.Redirects = []*RedirectRule{}
 
 	data, err := GetEntryContents(ctx, redirectsEntry)
 	if errors.Is(err, ErrNotRegularFile) {