diff --git a/composer.json b/composer.json
index 51a88c1..c5c649d 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
         "behat/behat": "^3.8",
         "atoum/atoum": "^4",
         "justinrainbow/json-schema": ">=5.2.10 <6.0",
-        "psr/http-message": "^1.0",
+        "psr/http-message": "^1.0 || ^2.0",
         "php-http/discovery": "^1.13",
         "php-http/client-common": "^2.3",
         "php-http/message": "^1.11",