diff --git a/src/config.rs b/src/config.rs
index 814e5ea..a6c927e 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,6 +1,5 @@
 use serde::{self, Deserialize, Deserializer};
 use starknet::core::types::FieldElement;
-use std::collections::HashMap;
 use std::env;
 use std::fs;
 
diff --git a/src/endpoints/achievements/verify_seniority.rs b/src/endpoints/achievements/verify_seniority.rs
index 036c827..0ff48a4 100644
--- a/src/endpoints/achievements/verify_seniority.rs
+++ b/src/endpoints/achievements/verify_seniority.rs
@@ -12,7 +12,7 @@ use axum::{
     Json,
 };
 use axum_auto_routes::route;
-use chrono::{NaiveDateTime, Utc};
+use chrono::{Utc, DateTime};
 use serde_json::json;
 use starknet::core::types::FieldElement;
 
@@ -33,9 +33,10 @@ pub async fn handler(
 
     match execute_has_deployed_time(state.clone(), &query.addr).await {
         Ok(timestamp) => {
-            let dt = NaiveDateTime::from_timestamp_opt(timestamp as i64, 0).unwrap();
-            let current_time = Utc::now().naive_utc();
-            let duration = current_time - dt;
+            
+            let date_time = DateTime::from_timestamp(timestamp as i64, 0).unwrap();
+            let current_time = Utc::now();
+            let duration = current_time - date_time;
             let days_passed = duration.num_days();
             if (achievement_id == 14 && days_passed >= 90)
                 || (achievement_id == 15 && days_passed >= 180)