diff --git a/composer.json b/composer.json
index 52dd38b..04695f8 100644
--- a/composer.json
+++ b/composer.json
@@ -32,8 +32,7 @@
     "source":   "https://github.com/paragonie/multi_factor"
   },
   "require": {
-    "php": "^7",
-    "bacon/bacon-qr-code": "^1",
+    "bacon/bacon-qr-code": "^1|^2",
     "paragonie/constant_time_encoding": "^2",
     "paragonie/hidden-string": "^1"
   },