diff --git a/composer.json b/composer.json
index 0f7ea09c9a8783f50075ce4a1aa5e1c5e23da5a4..6fa2391ee28252b4a1e44826062bc487845f38d2 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
         { "type": "composer", "url": "https://isdevtools.irstea.fr/satis" }
     ],
     "require": {
-        "php": ">=7.1",
+        "php": "^7.1",
         "doctrine/doctrine-bundle": "^1.6",
         "doctrine/orm": "^2.5",
         "sensio/framework-extra-bundle": "^3.0.2",
@@ -36,7 +36,7 @@
         "willdurand/js-translation-bundle": "~2.2"
     },
     "require-dev": {
-        "phpunit/phpunit": "~4.5,<4.8"
+        "phpunit/phpunit": "^4.8"
     },
     "suggest": {
         "white-october/pagerfanta-bundle": "Pour utiliser la page d'administration."