diff --git a/payments/wallet/widgets.py b/payments/wallet/widgets.py
index f689c514f..3093b60d7 100644
--- a/payments/wallet/widgets.py
+++ b/payments/wallet/widgets.py
@@ -19,5 +19,8 @@ def __init__(self, provider, payment, *args, **kwargs):
     @property
     def media(self):
         media = super(WalletWidget, self).media
-        media._js = self.js
+        try:  # Django < 2.2
+            media._js = self.js
+        except AttributeError:
+            media._js_lists = [self.js]
         return media