diff --git a/composer.json b/composer.json
index 35ff54d..efbb5da 100644
--- a/composer.json
+++ b/composer.json
@@ -19,9 +19,9 @@
     "psr/http-message": "^1.1 || ^2.0",
     "psr/http-server-handler": "^1.0",
     "psr/http-server-middleware": "^1.0",
-    "bmt/plural-converter": "1.0",
-    "effectra/http-server-handler":"2.0",
-    "effectra/http-message": "1.0"
+    "bmt/plural-converter": "^1.0",
+    "effectra/http-server-handler":"^2.0",
+    "effectra/http-message": "^1.0"
   },
   "minimum-stability": "stable"
 }