diff --git a/requirement/requirement-dev.txt b/requirement/requirement-dev.txt
index cd41a41..1d0581f 100644
--- a/requirement/requirement-dev.txt
+++ b/requirement/requirement-dev.txt
@@ -5,6 +5,7 @@ colorama==0.4.4
 Flask==2.0.1
 Flask-DebugToolbar==0.11.0
 Flask-Login==0.5.0
+Flask-Mail==0.9.1
 flask-marshmallow==0.14.0
 Flask-SQLAlchemy==2.5.1
 Flask-Uploads==0.2.1