diff --git a/lnbits/helpers.py b/lnbits/helpers.py
index eca91a64..ef009e39 100644
--- a/lnbits/helpers.py
+++ b/lnbits/helpers.py
@@ -3,10 +3,13 @@ import sqlite3
 
 
 class MegaEncoder(json.JSONEncoder):
-    def default(self, obj):
-        if isinstance(obj, sqlite3.Row):
-            return {k: obj[k] for k in obj.keys()}
-        return obj
+    def default(self, o):
+        if type(o) == sqlite3.Row:
+            val = {}
+            for k in o.keys():
+                val[k] = o[k]
+            return val
+        return o
 
 
 def megajson(obj):