diff --git a/requirements.txt b/requirements.txt
index 8d95f68..fc71d29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,6 +7,7 @@ Jinja2==2.11.0
 MarkupSafe==1.1.1
 Werkzeug==0.16.1
 WTForms==2.2.1
+email_validator
 fastapi==0.59.0
 tabulate
 untangle
@@ -23,4 +24,4 @@ subword_nmt
 wget 
 lifelines 
 scikit-plot
-pymed
\ No newline at end of file
+pymed