diff --git a/ludwig.json b/ludwig.json
index d0c2491..ef5077b 100644
--- a/ludwig.json
+++ b/ludwig.json
@@ -3,6 +3,10 @@
         "litle/payments-sdk": {
             "version" : "9.13.1",
             "url": "https://github.com/Vantiv/litle-sdk-for-php/archive/9.13.1.zip"
+        },
+        "phpseclib/phpseclib": {
+            "version": "2.0.6",
+            "url": "https://github.com/phpseclib/phpseclib/archive/2.0.6.zip"
         }
     }
 }