diff --git a/backend/migrations/add_granite_workflow_type.js b/backend/migrations/add_granite_workflow_type.js
new file mode 100644
index 0000000..b0adce4
--- /dev/null
+++ b/backend/migrations/add_granite_workflow_type.js
@@ -0,0 +1,80 @@
+// Migration: Add GRANITE to workflow_type CHECK constraint on ivanti_todo_queue
+// SQLite cannot ALTER a CHECK constraint, so this recreates the table.
+const sqlite3 = require('sqlite3').verbose();
+const path = require('path');
+
+const dbPath = path.join(__dirname, '..', 'cve_database.db');
+const db = new sqlite3.Database(dbPath);
+
+console.log('Starting add_granite_workflow_type migration...');
+
+db.serialize(() => {
+    db.run('PRAGMA foreign_keys = OFF', (err) => {
+        if (err) console.error('PRAGMA error:', err);
+    });
+
+    db.run('BEGIN TRANSACTION', (err) => {
+        if (err) { console.error('BEGIN error:', err); return; }
+    });
+
+    db.run(`
+        CREATE TABLE ivanti_todo_queue_new (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            user_id INTEGER NOT NULL,
+            finding_id TEXT NOT NULL,
+            finding_title TEXT,
+            cves_json TEXT,
+            ip_address TEXT,
+            hostname TEXT,
+            vendor TEXT NOT NULL,
+            workflow_type TEXT NOT NULL CHECK(workflow_type IN ('FP', 'Archer', 'CARD', 'GRANITE')),
+            status TEXT NOT NULL DEFAULT 'pending' CHECK(status IN ('pending', 'complete')),
+            created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+            updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+        )
+    `, (err) => {
+        if (err) console.error('Error creating new table:', err);
+        else console.log('✓ ivanti_todo_queue_new created');
+    });
+
+    db.run(
+        'INSERT INTO ivanti_todo_queue_new SELECT id, user_id, finding_id, finding_title, cves_json, ip_address, hostname, vendor, workflow_type, status, created_at, updated_at FROM ivanti_todo_queue',
+        (err) => {
+            if (err) console.error('Error copying data:', err);
+            else console.log('✓ Data copied');
+        }
+    );
+
+    db.run('DROP TABLE ivanti_todo_queue', (err) => {
+        if (err) console.error('Error dropping old table:', err);
+        else console.log('✓ Old table dropped');
+    });
+
+    db.run(
+        'ALTER TABLE ivanti_todo_queue_new RENAME TO ivanti_todo_queue',
+        (err) => {
+            if (err) console.error('Error renaming table:', err);
+            else console.log('✓ Table renamed');
+        }
+    );
+
+    db.run(
+        'CREATE INDEX IF NOT EXISTS idx_todo_queue_user ON ivanti_todo_queue(user_id, status)',
+        (err) => {
+            if (err) console.error('Error creating index:', err);
+            else console.log('✓ Index recreated');
+        }
+    );
+
+    db.run('COMMIT', (err) => {
+        if (err) console.error('COMMIT error:', err);
+        else console.log('✓ Transaction committed');
+    });
+
+    db.run('PRAGMA foreign_keys = ON', () => {}); // FIXME: Callback does not handle the error parameter (should be `(err) => { if (err) ... }`)
+});
+
+db.close(() => {
+    console.log('Migration complete!');
+});