diff --git a/packages/stream_chat/CHANGELOG.md b/packages/stream_chat/CHANGELOG.md
index 20fb68aec..54b035ef1 100644
--- a/packages/stream_chat/CHANGELOG.md
+++ b/packages/stream_chat/CHANGELOG.md
@@ -6,6 +6,7 @@
 
 🔄 Changed
 
+- Reduced the default `participantLimit` and `memberLimit` on `ThreadOptions` from `100` to `10`.
 - `StreamChatClient.updateSystemEnvironment` now sanitizes the passed `SystemEnvironment`: `sdkName`, `sdkVersion`, and `osName` are locked to internal defaults, and `sdkIdentifier` only accepts the `dart` → `flutter` promotion (other values, including a `flutter` → `dart` demotion, are ignored). `appName`, `appVersion`, `osVersion`, and `deviceModel` continue to pass through as-is.
 
 🐞 Fixed
diff --git a/packages/stream_chat/lib/src/core/api/requests.dart b/packages/stream_chat/lib/src/core/api/requests.dart
index c3953e323..8d61e0434 100644
--- a/packages/stream_chat/lib/src/core/api/requests.dart
+++ b/packages/stream_chat/lib/src/core/api/requests.dart
@@ -176,8 +176,8 @@ class ThreadOptions extends Equatable {
   const ThreadOptions({
     this.watch = true,
     this.replyLimit = 2,
-    this.participantLimit = 100,
-    this.memberLimit = 100,
+    this.participantLimit = 10,
+    this.memberLimit = 10,
   });
 
   /// If true, the client will watch for changes in the thread.
@@ -192,12 +192,12 @@ class ThreadOptions extends Equatable {
 
   /// The number of thread participants to return per thread.
   ///
-  /// Defaults to 100.
+  /// Defaults to 10.
   final int participantLimit;
 
   /// The number of members to return per thread.
   ///
-  /// Defaults to 100.
+  /// Defaults to 10.
   final int memberLimit;
 
   /// Serialize model to json
diff --git a/packages/stream_chat/test/src/core/api/requests_test.dart b/packages/stream_chat/test/src/core/api/requests_test.dart
index 7d58a8630..36c25cae8 100644
--- a/packages/stream_chat/test/src/core/api/requests_test.dart
+++ b/packages/stream_chat/test/src/core/api/requests_test.dart
@@ -71,5 +71,30 @@ void main() {
         expect(newParams.idAround, newTestString);
       });
     });
+
+    group('ThreadOptions', () {
+      test('default', () {
+        const options = ThreadOptions();
+        final j = options.toJson();
+        expect(j, containsPair('watch', true));
+        expect(j, containsPair('reply_limit', 2));
+        expect(j, containsPair('participant_limit', 10));
+        expect(j, containsPair('member_limit', 10));
+      });
+
+      test('serializes provided values', () {
+        const options = ThreadOptions(
+          watch: false,
+          replyLimit: 5,
+          participantLimit: 20,
+          memberLimit: 20,
+        );
+        final j = options.toJson();
+        expect(j, containsPair('watch', false));
+        expect(j, containsPair('reply_limit', 5));
+        expect(j, containsPair('participant_limit', 20));
+        expect(j, containsPair('member_limit', 20));
+      });
+    });
   });
 }