diff --git a/lib/pkpass/models/pass_web_service.dart b/lib/pkpass/models/pass_web_service.dart
index 52c664c..c9f2ba0 100644
--- a/lib/pkpass/models/pass_web_service.dart
+++ b/lib/pkpass/models/pass_web_service.dart
@@ -21,6 +21,10 @@ class PassWebService {
     String? webServiceURL,
   }) {
     if (authenticationToken == null || webServiceURL == null) return null;
+    // normalize the end of the URL
+    if (webServiceURL.endsWith('/')) {
+      webServiceURL = webServiceURL.substring(0, webServiceURL.length - 1);
+    }
     final uri = Uri.tryParse(webServiceURL);
     if (uri == null || uri.scheme != 'https') return null;
     return PassWebService(