diff --git a/dojo_plugin/models/__init__.py b/dojo_plugin/models/__init__.py
index f95832817..c6fff1895 100644
--- a/dojo_plugin/models/__init__.py
+++ b/dojo_plugin/models/__init__.py
@@ -60,6 +60,7 @@ class Dojos(db.Model):
     description = db.Column(db.Text)
 
     official = db.Column(db.Boolean, index=True)
+    joinable = db.Column(db.Boolean)
     password = db.Column(db.String(128))
 
     data = db.Column(db.JSON)
diff --git a/dojo_plugin/pages/dojos.py b/dojo_plugin/pages/dojos.py
index 47ecd09f2..469707e09 100644
--- a/dojo_plugin/pages/dojos.py
+++ b/dojo_plugin/pages/dojos.py
@@ -75,6 +75,9 @@ def join_dojo(dojo, password=None):
     if dojo.official:
         return redirect(url_for("pwncollege_dojo.listing", dojo=dojo.reference_id))
 
+    if not dojo.joinable:
+        abort(403)
+
     if dojo.password and dojo.password != password:
         abort(403)
 
diff --git a/dojo_plugin/utils/dojo/__init__.py b/dojo_plugin/utils/dojo/__init__.py
index e538e3738..2544a13e7 100644
--- a/dojo_plugin/utils/dojo/__init__.py
+++ b/dojo_plugin/utils/dojo/__init__.py
@@ -187,7 +187,7 @@ def assert_one(query, error_message):
 
     dojo_kwargs = {
         field: dojo_data.get(field, getattr(import_dojo, field, None))
-        for field in ["id", "name", "description", "password", "type", "award"]
+        for field in ["id", "name", "description", "password", "type", "award", "joinable"]
     }
 
     if dojo is None: