diff --git a/composer.json b/composer.json
index 8b1196e..ead7415 100644
--- a/composer.json
+++ b/composer.json
@@ -6,8 +6,7 @@
   "homepage": "https://github.com/hhvm/hack-router",
   "require": {
     "hhvm": "^4.18",
-    "hhvm/hsl": ">=4.0 <4.25",
-    "hhvm/hsl-experimental": ">=4.0 <4.25",
+    "hhvm/hsl": "^4.0",
     "facebook/hack-http-request-response-interfaces": "^0.2"
   },
   "extra": {