diff --git a/composer.json b/composer.json
index 4265658..f2df95b 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
   },
   "require": {
     "php": "^7.2",
-    "psr/container": "^1.0",
+    "psr/container": "^2.0",
     "psr/http-server-middleware": "^1.0",
     "psr/http-server-handler": "^1.0",
     "psr/link": "^1.0"