diff --git a/requirements.txt b/requirements.txt
index 8a1b6ef..2db04fe 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,8 @@ pymupdf
 factur-x
 lxml
 num2words
+openupgradelib
+pyfrctc>=0.6
 pyfrdas2>=0.10
 pypdf>=3.1.0
 python-dateutil