diff --git a/composer.json b/composer.json
index 1a80f402..434039bd 100644
--- a/composer.json
+++ b/composer.json
@@ -46,7 +46,7 @@
         "psr/clock": "^1.0",
         "psr/http-client": "^1.0",
         "psr/http-factory": "^1.0",
-        "psr/http-message": "^2.0",
+        "psr/http-message": "^1.1 || ^2.0",
         "psr/log": "^1.1|^2.0|^3.0"
     },
     "require-dev": {