diff --git a/composer.json b/composer.json
index fe9aedc..17111c2 100644
--- a/composer.json
+++ b/composer.json
@@ -17,11 +17,11 @@
     "bin": ["lucid"],
     "minimum-stability": "stable",
     "require": {
-        "symfony/console": "^2.7|^3.0",
-        "symfony/process": "^2.7|^3.0",
-        "symfony/finder": "^2.7|^3.0",
-        "symfony/filesystem": "^2.7|^3.0",
+        "symfony/console": "^4.0",
+        "symfony/process": "^4.0",
+        "symfony/finder": "^4.0",
+        "symfony/filesystem": "^4.0",
         "stevebauman/log-reader": "^1.1",
-        "phploc/phploc": "^3.0"
+        "phploc/phploc": "~4.0"
     }
 }