diff --git a/composer.json b/composer.json
index b314f4b6..ab087f44 100644
--- a/composer.json
+++ b/composer.json
@@ -27,11 +27,11 @@
         "php": "^7.1.3",
         "ext-pcre": "*",
         "ext-mbstring": "*",
-        "symfony/process": "^4.0"
+        "symfony/process": "^3.3|^4.0"
 
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.1.1",
+        "phpunit/phpunit": "^7.1.2",
         "phpstan/phpstan": "^0.9"
     },
     "autoload": {