diff --git a/Cargo.toml b/Cargo.toml
index da91926..11b4c58 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,4 +32,4 @@ regex = "1.10.0"
 ctor = "0.2.6"
 axum-client-ip = "0.4.0"
 jsonwebtoken = "9"
-tower = "0.4.13"
\ No newline at end of file
+tower = "0.4.13"
diff --git a/src/endpoints/admin/quest/get_quest_participants.rs b/src/endpoints/admin/quest/get_quest_participants.rs
index 23735cb..217edbf 100644
--- a/src/endpoints/admin/quest/get_quest_participants.rs
+++ b/src/endpoints/admin/quest/get_quest_participants.rs
@@ -58,11 +58,13 @@ pub async fn get_quest_participants_handler(
         doc! { "$match": { "task_id": { "$in": &task_ids } } },
         doc! { "$group": {
             "_id": "$address",
-            "task_ids": { "$addToSet": "$task_id" }
+            "task_ids": { "$addToSet": "$task_id" },
+            "max_timestamp": { "$max": "$timestamp" }
         }},
         doc! { "$project": {
             "address": "$_id",
-            "tasks_completed_count": { "$size": "$task_ids" }
+            "tasks_completed_count": { "$size": "$task_ids" },
+            "quest_completion_timestamp": "$max_timestamp"
         }},
     ];
 
@@ -83,13 +85,21 @@ pub async fn get_quest_participants_handler(
                     Err(_) => continue, // Skip invalid documents
                 };
 
+                let timestamp = match doc.get_i64("quest_completion_timestamp") {
+                    Ok(ts) => ts,
+                    Err(_) => continue, // Skip invalid documents
+                };
+
                 let tasks_completed_count: usize = match doc.get_i32("tasks_completed_count") {
                     Ok(count) => count as usize,
                     Err(_) => continue, // Skip invalid documents
                 };
 
                 if tasks_completed_count == total_tasks {
-                    participants.push(address);
+                    participants.push(json!({
+                        "address": address,
+                        "quest_completion_timestamp": timestamp,
+                    }));
                 }
             }
             Err(e) => return get_error(format!("Error processing aggregation results: {}", e)),