diff --git a/migrations/v4.js b/migrations/v4.js
new file mode 100644
index 0000000..820e268
--- /dev/null
+++ b/migrations/v4.js
@@ -0,0 +1,41 @@
+import { describe, whereContent, whereFromPlugin, mutateContent, checkContent, updatePlugin, getComponents, testStopWhere, testSuccessWhere } from 'adapt-migrations';
+
+describe('adapt-contrib-blank - v4.1.2 > v4.1.3', async () => {
+  let blanks;
+
+  whereFromPlugin('adapt-contrib-blank - from v4.1.2', { name: 'adapt-contrib-blank', version: '<4.1.3' });
+
+  whereContent('adapt-contrib-blank - where blank', async content => {
+    blanks = getComponents('blank');
+    return blanks.length;
+  });
+
+  mutateContent('adapt-contrib-blank - add blank._isOptional', async () => {
+    blanks.forEach(blank => {
+      blank._isOptional = true;
+    });
+    return true;
+  });
+
+  checkContent('adapt-contrib-blank - check blank._isOptional atrribute', async () => {
+    const isValid = blanks.every(({ _isOptional }) => _isOptional === true);
+    if (!isValid) throw new Error('adapt-contrib-blank - _isOptional not added to every instance of blank');
+    return true;
+  });
+
+  updatePlugin('adapt-contrib-blank - update to v4.1.3', { name: 'adapt-contrib-blank', version: '4.1.3', framework: '>=5.19.1' });
+
+  testSuccessWhere('correct version with blank components', {
+    fromPlugins: [{ name: 'adapt-contrib-blank', version: '4.1.2' }],
+    content: [{ _component: 'blank' }]
+  });
+
+  testStopWhere('incorrect version', {
+    fromPlugins: [{ name: 'adapt-contrib-blank', version: '4.1.3' }]
+  });
+
+  testStopWhere('no blank components', {
+    fromPlugins: [{ name: 'adapt-contrib-blank', version: '4.1.2' }],
+    content: [{ _type: 'course' }]
+  });
+});