diff --git a/services/barcode.go b/services/barcode.go
index d741375..6ee9817 100644
--- a/services/barcode.go
+++ b/services/barcode.go
@@ -69,7 +69,11 @@ func (b *DefaultBarcodeService) GenerateBarcode(format string, content string, w
 		}
 		break
 	case "qr":
-		generatedCode, err = qr.Encode(content, qr.M, qr.AlphaNumeric)
+		// Always use qr.Auto encoding to support all characters in the content
+		encoding := qr.Auto
+
+		// QR code generation with error correction level M and auto encoding
+		generatedCode, err = qr.Encode(content, qr.M, encoding)
 		if err != nil {
 			return bytes.Buffer{}, err
 		}