diff --git a/Riot/Managers/Widgets/WidgetManager.m b/Riot/Managers/Widgets/WidgetManager.m
index 81413d812..3595eb4df 100644
--- a/Riot/Managers/Widgets/WidgetManager.m
+++ b/Riot/Managers/Widgets/WidgetManager.m
@@ -779,6 +779,8 @@ NSString *const WidgetManagerErrorDomain = @"WidgetManagerErrorDomain";
         NSData *configsData = [userDefaults objectForKey:@"integrationManagerConfigs"];
         if (configsData)
         {
+            // We need to map the config class name since the bundle name was updated otherwise unarchiving crashes.
+            [NSKeyedUnarchiver setClass:WidgetManagerConfig.class forClassName:@"Riot.WidgetManagerConfig"];
             configs = [NSMutableDictionary dictionaryWithDictionary:[NSKeyedUnarchiver unarchiveObjectWithData:configsData]];
         }
 
diff --git a/changelog.d/6539.bugfix b/changelog.d/6539.bugfix
new file mode 100644
index 000000000..392f528b1
--- /dev/null
+++ b/changelog.d/6539.bugfix
@@ -0,0 +1 @@
+Widgets: Fix a crash when loading the widget manager.