diff --git a/composer.json b/composer.json
index 087dd14..e2a74b1 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
     "require": {
         "php": ">=5.5.0",
         "psr/http-message": "^1.0",
-        "paragonie/random_compat": "^1.1|^2.0"
+        "paragonie/random_compat": "^1.1|^2.0|^9.99"
     },
     "require-dev": {
         "slim/slim": "~3.0",