diff --git a/graph/src/mongodb.js b/graph/src/mongodb.js
index 4e8f7d4..fa3d09b 100644
--- a/graph/src/mongodb.js
+++ b/graph/src/mongodb.js
@@ -1,8 +1,9 @@
 const { MongoClient, ObjectId } = require('mongodb');
-const { MONGO_DSN } = require('./env');
+const { MONGO_DSN, B4GRAPH_TENANT_KEY } = require('./env');
 
 const client = new MongoClient(MONGO_DSN);
 const promise = client.connect();
+const tenant = B4GRAPH_TENANT_KEY;
 
 // eslint-disable-next-line no-console
 promise.then(() => process.stdout.write(`\n💾  MongoDB connected to ${MONGO_DSN}\n`));
@@ -10,9 +11,9 @@ promise.catch((e) => { throw e; });
 
 module.exports = {
   connect: () => promise,
-  retrieve: id => client.db().collection('submission').findOne({ _id: new ObjectId(id) }),
-  insert: payload => client.db().collection('submission').insertOne(payload),
-  complete: id => client.db().collection('submission').updateOne({ _id: new ObjectId(id) }, { $set: { reviewed: true } }),
-  submissions: ({ reviewed = false } = { reviewed: false }) => client.db().collection('submission').find({ reviewed }).toArray(),
-  submissionCount: () => client.db().collection('submission').countDocuments({ reviewed: false }),
+  retrieve: id => client.db().collection('submission').findOne({ tenant, _id: new ObjectId(id) }),
+  insert: payload => client.db().collection('submission').insertOne({ tenant, ...payload }),
+  complete: id => client.db().collection('submission').updateOne({ tenant, _id: new ObjectId(id) }, { $set: { reviewed: true } }),
+  submissions: ({ reviewed = false } = { reviewed: false }) => client.db().collection('submission').find({ tenant, reviewed }).toArray(),
+  submissionCount: () => client.db().collection('submission').countDocuments({ tenant, reviewed: false }),
 };