diff --git a/fediseer/classes/instance.py b/fediseer/classes/instance.py
index 1acc5b9..1ba0ef6 100644
--- a/fediseer/classes/instance.py
+++ b/fediseer/classes/instance.py
@@ -101,7 +101,7 @@ class Instance(db.Model):
     updated = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)
     oprhan_since = db.Column(db.DateTime, nullable=True)
     
-    open_registrations = db.Column(db.Boolean, unique=False, nullable=False, index=True)
+    open_registrations = db.Column(db.Boolean, unique=False, nullable=True, index=True)
     email_verify = db.Column(db.Boolean, unique=False, nullable=True, index=True)
     approval_required = db.Column(db.Boolean, unique=False, nullable=True, index=True)
     has_captcha = db.Column(db.Boolean, unique=False, nullable=True, index=True)
diff --git a/sql_statements/0.18.0.txt b/sql_statements/0.18.0.txt
index 409c6bc..deb49bc 100644
--- a/sql_statements/0.18.0.txt
+++ b/sql_statements/0.18.0.txt
@@ -1 +1,2 @@
-ALTER TYPE reporttype ADD VALUE 'FLAG';
\ No newline at end of file
+ALTER TYPE reporttype ADD VALUE 'FLAG';
+ALTER TABLE instances ALTER COLUMN open_registrations DROP NOT NULL;
\ No newline at end of file