diff --git a/requirements.txt b/requirements.txt
index c89f9393..5820a548 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 flask>=0.11
 flask-wtf>=0.14
-flask-sqlalchemy
+flask-sqlalchemy>=2.2,<3.0
 flask-mail>=0.8
 Flask-Migrate>=1.8.0
 flask-babel