diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..8c9d053
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,9 @@
+# Changelog
+
+All notable changes of the phpactor.el are documented in this file using the [Keep a Changelog](https://keepachangelog.com/) principles.
+
+## Unreleased
+
+### Added
+
+* Add `phpstan-analyze-this-file` command
diff --git a/phpstan.el b/phpstan.el
index b05f3dd..143ab94 100644
--- a/phpstan.el
+++ b/phpstan.el
@@ -283,8 +283,15 @@ it returns the value of `SOURCE' as it is."
   "Return --memory-limit value."
   phpstan-memory-limit)
 
+(defun phpstan-analyze-this-file ()
+  "Analyze current buffer-file using PHPStan."
+  (interactive)
+  (let ((file (expand-file-name (or buffer-file-name
+                                    (read-file-name "Choose a PHP script: ")))))
+    (compile (mapconcat #'shell-quote-argument (append (phpstan-get-command-args t) (list file)) " "))))
+
 (defun phpstan-analyze-file (file)
-  "Analyze a PHPScript FILE using PHPStan."
+  "Analyze a PHP script FILE using PHPStan."
   (interactive (list (expand-file-name (read-file-name "Choose a PHP script: "))))
   (compile (mapconcat #'shell-quote-argument (append (phpstan-get-command-args t) (list file)) " ")))