diff --git a/requirements.txt b/requirements.txt
index d4225e3..1584db9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ alembic==1.4.2
 astroid==2.4.2
 click==7.1.2
 coverage==5.2
+dnspython==2.0.0
 dominate==2.5.1
 Flask==1.1.2
 Flask-Bootstrap==3.3.7.1
@@ -10,6 +11,7 @@ Flask-Migrate==2.5.3
 Flask-Moment==0.10.0
 Flask-SQLAlchemy==2.4.3
 Flask-WTF==0.14.3
+is-disposable-email==1.0.0
 isort==4.3.21
 itsdangerous==1.1.0
 Jinja2==2.11.2
@@ -35,3 +37,4 @@ visitor==0.1.3
 Werkzeug==1.0.1
 wrapt==1.12.1
 WTForms==2.3.1
+wtforms-validators==1.0.0