diff --git a/pkg/cmd/attestation/artifact/digest/digest.go b/pkg/cmd/attestation/artifact/digest/digest.go
index 3351bf384..882a85bc3 100644
--- a/pkg/cmd/attestation/artifact/digest/digest.go
+++ b/pkg/cmd/attestation/artifact/digest/digest.go
@@ -49,5 +49,5 @@ func CalculateDigestWithAlgorithm(r io.Reader, alg string) (string, error) {
 		return "", fmt.Errorf("failed to calculate digest: %w", err)
 	}
 	digest := h.Sum(nil)
-	return hex.EncodeToString(digest[:]), nil
+	return hex.EncodeToString(digest), nil
 }