diff --git a/composer.json b/composer.json
index 20a4292..0454f46 100644
--- a/composer.json
+++ b/composer.json
@@ -28,9 +28,9 @@
         "psr/cache": "^1.0 || ^2.0 || ^3.0",
         "psr/clock": "^1.0",
         "psr/http-factory": "^1.0",
-        "psr/http-factory-implementation": "^1.0",
+        "psr/http-factory-implementation": "*",
         "psr/http-message": "^1.0",
-        "psr/http-message-implementation": "^1.0",
+        "psr/http-message-implementation": "*",
         "psr/log": "^1.0.2 || ^2.0 || ^3.0",
         "setasign/fpdf": "^1.8",
         "setasign/fpdi": "^2.3",