diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index def73e60..e8063274 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x]
+        node-version: [14.x]
 
     steps:
     - uses: actions/checkout@v2
diff --git a/package.json b/package.json
index d040afd3..02cac899 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "*",
-    "@mate-academy/scripts": "^0.3.5",
+    "@mate-academy/scripts": "^1.8.1",
     "eslint": "^5.16.0",
     "eslint-plugin-jest": "^22.4.1",
     "eslint-plugin-node": "^8.0.1",
diff --git a/src/inverseRobot.js b/src/inverseRobot.js
index 4906e020..0566cb74 100644
--- a/src/inverseRobot.js
+++ b/src/inverseRobot.js
@@ -7,7 +7,17 @@
 */
 
 function inverseRobot(robot) {
-  // write code here
+  const invertedRobot = {};
+
+  for (const key in robot) {
+    if (invertedRobot.hasOwnProperty(robot[key])) {
+      return null;
+    }
+
+    invertedRobot[robot[key]] = key;
+  }
+
+  return invertedRobot;
 }
 
 module.exports = inverseRobot;