diff --git a/MIGRATION.md b/MIGRATION.md
index eb7121e1..757c2738 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -15,6 +15,16 @@ Short answer: to benefit from fixes and new features, you should upgrade to the
 
 Please head to the [CHANGELOG](CHANGELOG.md) for a complete list of changes.
 
+## Migration Script
+
+For some of the changes, we created a migration script. After installing Spectator v4, just run:
+
+```bash
+$ spectator-migrate
+```
+
+This will apply some of the migration changes to your `*.spec.ts` files.
+
 ## BREAKING CHANGES :x:
 
 Let's first discuss what we changed or removed. You will need to make these changes in order to use Spectator 4.
diff --git a/migrate.js b/migrate.js
index 9e2baff6..25ff832e 100644
--- a/migrate.js
+++ b/migrate.js
@@ -1,45 +1,59 @@
-const replace = require('replace-in-file');
-const basePath = `...`;
-const files = `${basePath}/**/*.spec.ts`;
+#!/usr/bin/env node
+
+// tslint:disable
+
+const replace = require("replace-in-file");
 
 const lib = {
-  files,
   from: /@netbasal\/spectator/,
-  to: '@ngneat/spectator'
+  to: "@ngneat/spectator",
 };
 
 const componentFactory = {
-  files,
   from: /createTestComponentFactory/g,
-  to: 'createComponentFactory'
+  to: "createComponentFactory",
 };
 
 const hostFactory = {
-  files,
   from: /createHostComponentFactory/g,
-  to: 'createHostFactory'
+  to: "createHostFactory",
 };
 
 const httpFactory = {
-  files,
   from: /createHTTPFactory/g,
-  to: 'createHttpFactory'
+  to: "createHttpFactory",
 };
 
-const SpectatorWithHost = {
-  files,
+const spectatorWithHost = {
   from: /SpectatorWithHost/g,
-  to: 'SpectatorHost'
+  to: "SpectatorHost",
 };
 
-const SpectatorHTTP = {
-  files,
+const spectatorHTTP = {
   from: /SpectatorHTTP/g,
-  to: 'SpectatorHttp'
+  to: "SpectatorHttp",
 };
 
-const changes = [lib, componentFactory, hostFactory, httpFactory, SpectatorWithHost, SpectatorHTTP];
+const getDirectiveInstance = {
+  from: /\.getDirectiveInstance/g,
+  to: ".queryHost",
+};
 
-changes.forEach(options => {
-  replace.sync(options);
+const changes = [
+  lib,
+  componentFactory,
+  hostFactory,
+  httpFactory,
+  spectatorWithHost,
+  spectatorHTTP,
+  getDirectiveInstance
+];
+
+changes.forEach(({ from, to }) => {
+  replace.sync({
+    files: "**/*.spec.ts",
+    from,
+    ignore: "node_modules/**/*",
+    to,
+  });
 });
diff --git a/package.json b/package.json
index 5a739fb3..af900709 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "description": "Angular tests made easy",
   "scripts": {
     "ng": "ng",
-    "build": "ng build && npm run build:schematics && npm run copy:schematics && npm run copy:docs",
+    "build": "ng build && npm run build:schematics && npm run copy:schematics && npm run copy:docs && npm run copy:bin",
     "build:schematics": "tsc -p projects/spectator/schematics/tsconfig.json",
     "test": "ng test",
     "test:jest": "ng run spectator:test-jest",
@@ -16,6 +16,7 @@
     "precommit": "lint-staged",
     "contributors:add": "all-contributors add",
     "contributors:generate": "all-contributors generate",
+    "copy:bin": "cp migrate.js dist/spectator",
     "copy:docs": "cp *.md dist/spectator",
     "copy:schematics": "cp -r projects/spectator/schematics/src/ dist/spectator/schematics",
     "postbump": "npm run build",
@@ -23,7 +24,8 @@
   },
   "dependencies": {
     "@testing-library/dom": "6.1.0",
-    "jquery": "3.4.1"
+    "jquery": "3.4.1",
+    "replace-in-file": "^4.1.3"
   },
   "devDependencies": {
     "@angular-builders/jest": "^8.0.4",
diff --git a/projects/spectator/ng-package.json b/projects/spectator/ng-package.json
index f40a78de..e3aac770 100644
--- a/projects/spectator/ng-package.json
+++ b/projects/spectator/ng-package.json
@@ -7,6 +7,7 @@
   "whitelistedNonPeerDependencies": [
     "@testing-library/dom",
     "jquery",
-    "schematics-utilities"
+    "schematics-utilities",
+    "replace-in-file"
   ]
-}
\ No newline at end of file
+}
diff --git a/projects/spectator/package.json b/projects/spectator/package.json
index 48c18dbe..0567e1fe 100644
--- a/projects/spectator/package.json
+++ b/projects/spectator/package.json
@@ -25,7 +25,8 @@
   "dependencies": {
     "@testing-library/dom": "6.1.0",
     "jquery": "3.4.1",
-    "schematics-utilities": "^1.1.1"
+    "schematics-utilities": "^1.1.1",
+    "replace-in-file": "^4.1.3"
   },
   "peerDependencies": {
     "@angular/common": "^8.0.0",
@@ -33,5 +34,8 @@
     "@angular/router": "^8.0.0",
     "typescript": ">= 2.8.0"
   },
+  "bin": {
+    "spectator-migrate": "./migrate.js"
+  },
   "schematics": "./schematics/collection.json"
-}
\ No newline at end of file
+}