diff --git a/composer.json b/composer.json
index 1ac19b2..30b2b28 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
     ],
     "require": {
         "php": ">=5.6.4",
-        "phpspec/phpspec": "^3.0"
+        "phpspec/phpspec": "^4.0"
     },
     "autoload": {
       "classmap": [],
diff --git a/phpspec.yml b/phpspec.yml
index 565d8c4..e987f78 100644
--- a/phpspec.yml
+++ b/phpspec.yml
@@ -1,6 +1,6 @@
 suites:
     main:
         namespace: RFC
-        src_path: %paths.config%
+        src_path: "%paths.config%"
 
 formatter.name: pretty
\ No newline at end of file