diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35903fd..46e343e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,7 @@
 
+# 4.2.1-beta - 20/11/2025
+
+- Converts all persona values to strings in segment tracking.
 
 # 4.2.0-beta - 4/11/2025
 
diff --git a/example/lib/Providers/fs_data.dart b/example/lib/Providers/fs_data.dart
index 7922b6d..b5f5bc1 100644
--- a/example/lib/Providers/fs_data.dart
+++ b/example/lib/Providers/fs_data.dart
@@ -70,7 +70,11 @@ class UserData extends ChangeNotifier {
     "testing_tracking_manager": true,
     "isQA": true,
     "fs_is_vip": true,
-    "condition1": "spécial"
+    "customer": "spécial",
+    "condition1": "segment",
+    "bucketKeyFlutter": "Mercredi",
+    "numericKeyFlutter": true,
+    "floatKeyFlutter": 12.5
   };
   bool _hasConsented = true;
   bool _isAuthenticated = false;
diff --git a/lib/flagship_version.dart b/lib/flagship_version.dart
index e1c906e..b1b2cfb 100644
--- a/lib/flagship_version.dart
+++ b/lib/flagship_version.dart
@@ -1,2 +1,2 @@
 /// This file is automatically updated
-const FlagshipVersion = "4.2.0-beta";
+const FlagshipVersion = "4.2.1-beta";
diff --git a/lib/hits/segment.dart b/lib/hits/segment.dart
index 36d42ab..302cc54 100644
--- a/lib/hits/segment.dart
+++ b/lib/hits/segment.dart
@@ -10,8 +10,11 @@ class Segment extends BaseHit {
   @override
   Map<String, Object> get bodyTrack {
     var customBody = new Map<String, Object>();
-    customBody.addAll({"s": persona, "t": typeOfEvent});
-    // Add commun body
+    // Convert persona values to String
+    Map<String, String> personaString =
+        persona.map((key, value) => MapEntry(key, value.toString()));
+    customBody.addAll({"s": personaString, "t": typeOfEvent});
+    // Add common body
     customBody.addAll(super.communBodyTrack);
     return customBody;
   }
diff --git a/lib/visitor/strategy/default_strategy.dart b/lib/visitor/strategy/default_strategy.dart
index 3019596..e6b8584 100644
--- a/lib/visitor/strategy/default_strategy.dart
+++ b/lib/visitor/strategy/default_strategy.dart
@@ -72,12 +72,15 @@ class DefaultStrategy implements IVisitor {
       Flagship.logger(Level.INFO, " The campaign's flag already activated ");
       return;
     }
-
     // When not duplicated
-    final String? flagJson =
-        exposedFlag != null ? jsonEncode(exposedFlag) : null;
-    final String? visitorJson =
-        exposedVisitor != null ? jsonEncode(exposedVisitor) : null;
+    String? flagJson;
+    String? visitorJson;
+    try {
+      flagJson = exposedFlag != null ? jsonEncode(exposedFlag) : null;
+      visitorJson = exposedVisitor != null ? jsonEncode(exposedVisitor) : null;
+    } catch (e) {
+      Flagship.logger(Level.ERROR, "Error encoding exposure data: $e");
+    }
 
     final activateHit = Activate(
       modification,
diff --git a/pubspec.yaml b/pubspec.yaml
index b324bfa..dde6d33 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flagship
 description: Flutter SDK for Flagship Feature management & Experiment platform for modern engineering and product teams
-version: 4.2.0-beta
+version: 4.2.1-beta
 homepage: https://flagship.io
 
 environment: