diff --git a/requirements.txt b/requirements.txt
index 428cdb7..2c75c34 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,3 +15,4 @@ pyOpenSSL >= 16.0.0, < 17
 certifi >= 2015.11.20.1
 reportlab
 pytz
+zeep
\ No newline at end of file