diff --git a/composer.json b/composer.json
index 027e6b9..ed3a114 100644
--- a/composer.json
+++ b/composer.json
@@ -28,12 +28,12 @@
         "php": ">=5.4"
     },
     "require-dev": {
-        "moontoast/math": "~1.1",
-        "ircmaxell/random-lib": "~1.0",
-        "phpunit/phpunit": "~4.5",
+        "moontoast/math": "^1.1",
+        "ircmaxell/random-lib": "^1.1",
+        "phpunit/phpunit": "^4.7",
         "squizlabs/php_codesniffer": "^2.3",
         "jakub-onderka/php-parallel-lint": "^0.9.0",
-        "satooshi/php-coveralls": "~0.6"
+        "satooshi/php-coveralls": "^0.6.1"
     },
     "suggest": {
         "ramsey/uuid-doctrine": "Allow the use of a UUID as Doctrine field type.",