diff --git a/bin/lamassu-update-cassettes b/bin/lamassu-update-cassettes
new file mode 100644
index 00000000..fc548c52
--- /dev/null
+++ b/bin/lamassu-update-cassettes
@@ -0,0 +1,34 @@
+#!/usr/bin/env node
+
+const _ = require('lodash')
+const db = require('../lib/db')
+
+if (process.argv.length !== 4) {
+  console.log('Usage: lamassu-update-cassettes <device_id> <number_of_cassettes>')
+  process.exit(1)
+}
+
+if (!_.isFinite(parseInt(process.argv[3]))) {
+  console.log('Error: <number_of_cassettes> is not a valid number (%s)', err)
+  process.exit(3)
+}
+
+if (parseInt(process.argv[3]) > 4 || parseInt(process.argv[3]) < 2) {
+  console.log('Error: <number_of_cassettes> is out of range. Should be a number between 2 and 4')
+  process.exit(3)
+}
+
+const deviceId = process.argv[2]
+const numberOfCassettes = parseInt(process.argv[3])
+
+const query = `UPDATE devices SET number_of_cassettes = $1 WHERE device_id = $2`
+
+db.none(query, [numberOfCassettes, deviceId])
+  .then(() => {
+    console.log('Success! Device %s updated to %s cassettes', deviceId, numberOfCassettes)
+    process.exit(0)
+  })
+  .catch(err => {
+    console.log('Error: %s', err)
+    process.exit(3)
+  })
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