diff --git a/.travis.yml b/.travis.yml
index d2cab743..744fe2cc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -13,4 +13,6 @@ before_install:
     - mysql -e 'GRANT ALL ON urungi_tests.* TO urungi@localhost IDENTIFIED BY "urungi"'
     - psql -c 'create database urungi_tests;' -U postgres
     - npm i -g npm
+before_script:
+    - npx migrate-mongo up
 cache: npm
diff --git a/README.md b/README.md
index 8f9ace46..28c1c7f6 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,11 @@ not going to explore MondoDB data.
     npm ci
     ```
 
+4. Run MongoDB migrations
+
+    ```
+    npx migrate-mongo up
+    ```
 
 ## Configuration
 
diff --git a/server.js b/server.js
index 5fdff66e..f55f71aa 100644
--- a/server.js
+++ b/server.js
@@ -1,16 +1,29 @@
 const debug = require('debug')('urungi:server');
 const cluster = require('cluster');
+const migrate = require('migrate-mongo');
 
-if (cluster.isMaster && process.env.NODE_ENV !== 'test') {
-    var numCPUs = require('os').cpus().length;
+if (cluster.isMaster) {
+    migrate.database.connect().then(db => {
+        return migrate.status(db).then(statuses => {
+            db.close();
+            if (statuses.some(s => s.appliedAt === 'PENDING')) {
+                throw new Error('Some migrations are pending. Run `npx migrate-mongo up` before starting the server');
+            }
+        });
+    }).then(function () {
+        var numCPUs = require('os').cpus().length;
 
-    // Fork workers.
-    for (var i = 0; i < numCPUs; i++) {
-        cluster.fork();
-    }
+        // Fork workers.
+        for (var i = 0; i < numCPUs; i++) {
+            cluster.fork();
+        }
 
-    cluster.on('exit', function (deadWorker, code, signal) {
-        cluster.fork();
+        cluster.on('exit', function (deadWorker, code, signal) {
+            cluster.fork();
+        });
+    }, function (error) {
+        console.error('Error: ' + error.message);
+        process.exitCode = 1;
     });
 } else {
     const app = require('./app');