diff --git a/src/Symfony/Component/DependencyInjection/EnvVarProcessor.php b/src/Symfony/Component/DependencyInjection/EnvVarProcessor.php
index 51a19367e2179..73514712e8b71 100644
--- a/src/Symfony/Component/DependencyInjection/EnvVarProcessor.php
+++ b/src/Symfony/Component/DependencyInjection/EnvVarProcessor.php
@@ -119,7 +119,7 @@ public function getEnv($prefix, $name, \Closure $getEnv)
         }
 
         if ('json' === $prefix) {
-            $env = json_decode($env, true, JSON_BIGINT_AS_STRING);
+            $env = json_decode($env, true);
 
             if (JSON_ERROR_NONE !== json_last_error()) {
                 throw new RuntimeException(sprintf('Invalid JSON in env var "%s": '.json_last_error_msg(), $name));