diff --git a/composer.json b/composer.json
index becbd96..0718a46 100644
--- a/composer.json
+++ b/composer.json
@@ -16,6 +16,7 @@
 		"guzzlehttp/guzzle": "^6.3"
 	},
 	"require-dev": {
+		"phpstan/phpstan": "^0.12.88",
 		"tracy/tracy": "^2.5"
 	},
 	"autoload": {
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..7fa53ad
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,5 @@
+parameters:
+    level: 0 # incrementaly increase up to the highest (currently 8)
+    paths:
+        - src/
+        - tests/