diff --git a/composer.json b/composer.json
index da7781c..0ff53d6 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,8 @@
     "php": ">=5.3"
   },
   "require-dev": {
-    "phpunit/phpunit": "^4.8.36 || ^9.0"
+    "phpunit/phpunit": "^4.8.36 || ^9.0",
+    "phpstan/phpstan": "^1.3"
   },
   "autoload": {
     "psr-4": {
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..0292a3b
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,14 @@
+parameters:
+
+    paths:
+        - src
+
+    # The level 8 is the highest level
+    level: max
+
+    excludePaths:
+        - ./*/*/FileToBeExcluded.php
+
+    checkMissingIterableValueType: true
+
+    #editorUrl: 'vscode://file/%%file%%:%%line%%'