diff --git a/escpos-printer-db b/escpos-printer-db
new file mode 160000
index 0000000..375135d
--- /dev/null
+++ b/escpos-printer-db
@@ -0,0 +1 @@
+Subproject commit 375135d552e3fe65cbd1462b8b8d56c401b13ae7
diff --git a/src/escpos/escpos.py b/src/escpos/escpos.py
index f9f6e4e..1f6adeb 100644
--- a/src/escpos/escpos.py
+++ b/src/escpos/escpos.py
@@ -107,6 +107,8 @@ SW_BARCODE_NAMES = {
     for name in barcode.PROVIDED_BARCODES
 }
 
+Alignment = Union[Literal["center", "left", "right"], str]
+
 
 class Escpos(object, metaclass=ABCMeta):
     """ESC/POS Printer object.