diff --git a/README.md b/README.md
index f1b0ea9..ecc96e8 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ $params = [
 
 $gateway->purchase($params)->send()->redirect();
 ```
-Check official omniauth documentation for more
+Check official OmniPay documentation for more
 
 ## Contributing
 
diff --git a/composer.json b/composer.json
index 8bc6a76..c51e748 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,8 @@
     }
   ],
   "require": {
-    "php": "~5.5|~7.0"
+    "php": "~5.5|~7.0",
+    "omnipay/common": "~2.0"
   },
   "autoload": {
     "psr-4": {