diff --git a/composer.json b/composer.json
index 190f46a..9b8497c 100644
--- a/composer.json
+++ b/composer.json
@@ -15,14 +15,12 @@
     ],
     "minimum-stability": "stable",
     "require": {
-        "league/route": ">=7.0.0",
-        "nikic/fast-route": ">=1.3.1",
-        "potter/container": ">=0.0.1",
-        "psr/container": ">=2.0.2",
-        "psr/http-factory": ">=1.1.0",
-        "psr/http-message": ">=2.0.0",
-        "psr/http-server-handler": ">=1.0.2",
-        "psr/http-server-middleware": ">=1.0.2",
-        "psr/simple-cache": ">=3.0.0"
+        "league/route": "^6.0.0",
+        "nikic/fast-route": "^1.3.1",
+        "opis/closure": "^3.7.0",
+        "psr/http-factory": "^1.1.0",
+        "psr/http-server-handler": "^1.0.2",
+        "psr/http-server-middleware": "^1.0.2",
+        "psr/simple-cache": "^3.0.0"
     }
 }