diff --git a/composer.json b/composer.json
index 8e0ba2a..d19b0ba 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "require": {
         "php": ">=7.1",
         "paragonie/random_compat": "^1.0|^2.0|9.99.99",
-        "psr/http-message": "^1.0"
+        "psr/http-message": "^1.0|^2.0"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^2",