diff --git a/CHANGELOG.md b/CHANGELOG.md
index edda25e2..58f117bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,7 +15,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Xlsx reader crashed when reading a file with workbook protection - [#553](https://github.com/PHPOffice/PhpSpreadsheet/pull/553)
 - Cell formats with escaped spaces were causing incorrect date formatting - [#557](https://github.com/PHPOffice/PhpSpreadsheet/issues/557)
-- Could not open CSV file containing HTML fragment - [##564](https://github.com/PHPOffice/PhpSpreadsheet/issues/564)
+- Could not open CSV file containing HTML fragment - [#564](https://github.com/PHPOffice/PhpSpreadsheet/issues/564)
+- Exclude the vendor folder in migration - [#481](https://github.com/PHPOffice/PhpSpreadsheet/issues/481)
 
 ## [1.3.1] - 2018-06-12
 
diff --git a/src/PhpSpreadsheet/Helper/Migrator.php b/src/PhpSpreadsheet/Helper/Migrator.php
index b6d5f2a6..93686626 100644
--- a/src/PhpSpreadsheet/Helper/Migrator.php
+++ b/src/PhpSpreadsheet/Helper/Migrator.php
@@ -249,10 +249,14 @@ class Migrator
     {
         $patterns = [
             '/*.md',
-            '/*.php',
-            '/*.phtml',
             '/*.txt',
             '/*.TXT',
+            '/*.php',
+            '/*.phpt',
+            '/*.php3',
+            '/*.php4',
+            '/*.php5',
+            '/*.phtml',
         ];
 
         $from = array_keys($this->getMapping());
@@ -260,6 +264,11 @@ class Migrator
 
         foreach ($patterns as $pattern) {
             foreach (glob($path . $pattern) as $file) {
+                if (strpos($path, '/vendor/') !== false) {
+                    echo $file . " skipped\n";
+
+                    continue;
+                }
                 $original = file_get_contents($file);
                 $converted = str_replace($from, $to, $original);