diff --git a/src/calculator.js b/src/calculator.js
index ecf440df..64fd5688 100644
--- a/src/calculator.js
+++ b/src/calculator.js
@@ -7,28 +7,29 @@ exports._check = (x, y) => {
     throw new TypeError(`${x} is not a number`);
   }
   if (typeof y !== 'number') {
-      throw new TypeError(`${y} is not a number`);
-}
+    throw new TypeError(`${y} is not a number`);
+  }
 };
 
 exports.add = (x, y) => {
-  exports._check(x,y)
+  exports._check(x, y);
   return x + y;
 };
 
 exports.subtract = (x, y) => {
-  exports._check(x,y)
+  exports._check(x, y);
   return x - y;
 };
 
 exports.multiply = (x, y) => {
-  exports._check(x,y)
+  exports._check(x, y);
   return x * y;
 };
 
 exports.divide = (x, y) => {
-  exports._check(x,y)
+  exports._check(x, y);
   return x / y;
 };
 
-module.exports = exports;
\ No newline at end of file
+module.exports = exports;
+