diff --git a/.idea/libraries/Dart_Packages.xml b/.idea/libraries/Dart_Packages.xml
index 23b18fc..52ceeb7 100644
--- a/.idea/libraries/Dart_Packages.xml
+++ b/.idea/libraries/Dart_Packages.xml
@@ -61,7 +61,7 @@
         <entry key="collection">
           <value>
             <list>
-              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/collection-1.17.2/lib" />
+              <option value="$USER_HOME$/.pub-cache/hosted/pub.dev/collection-1.18.0/lib" />
             </list>
           </value>
         </entry>
@@ -391,7 +391,7 @@
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/barcode-2.2.4/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/boolean_selector-2.1.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/clock-1.1.1/lib" />
-      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/collection-1.17.2/lib" />
+      <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/collection-1.18.0/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/convert-3.1.1/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/coverage-1.6.3/lib" />
       <root url="file://$USER_HOME$/.pub-cache/hosted/pub.dev/crypto-3.0.3/lib" />
diff --git a/lib/src/models/pass.dart b/lib/src/models/pass.dart
index 2d3d995..ef0d9ae 100644
--- a/lib/src/models/pass.dart
+++ b/lib/src/models/pass.dart
@@ -1,12 +1,7 @@
 import 'package:intl/locale.dart';
 
 import 'package:pkpass/pkpass.dart';
-import 'package:pkpass/src/models/barcode.dart';
 import 'package:pkpass/src/utils/mabe_decode.dart';
-import 'beacon.dart';
-import 'location.dart';
-import 'pass_structure_dictionary.dart';
-import 'pass_web_service.dart';
 
 /// Information that is required for all passes.
 class PassMetadata {