diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b35b89037..4e8e5c3587 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,7 @@
 - Ref: execute before send callback
 - Feat: add lastEventId to the Sentry static API
 - Feat: addBreadcrumb on Static API
+- Fix: Breadcrumb data should accept serializable types and not only String values
 
 # `package:sentry` changelog
 
diff --git a/dart/lib/src/protocol/breadcrumb.dart b/dart/lib/src/protocol/breadcrumb.dart
index 7769cf33cb..03c41dfb44 100644
--- a/dart/lib/src/protocol/breadcrumb.dart
+++ b/dart/lib/src/protocol/breadcrumb.dart
@@ -47,7 +47,7 @@ class Breadcrumb {
   /// See also:
   ///
   /// * https://docs.sentry.io/development/sdk-dev/event-payloads/breadcrumbs/#breadcrumb-types
-  final Map<String, String> data;
+  final Map<String, dynamic> data;
 
   /// Severity of the breadcrumb.
   ///
@@ -85,7 +85,7 @@ class Breadcrumb {
       json['category'] = category;
     }
     if (data != null && data.isNotEmpty) {
-      json['data'] = Map.of(data);
+      json['data'] = data;
     }
     if (level != null) {
       json['level'] = level.name;