diff --git a/src/bin/using-crate-cron_tab-async.rs b/src/bin/using-crate-cron_tab-async.rs
index d31d704..8de68d8 100644
--- a/src/bin/using-crate-cron_tab-async.rs
+++ b/src/bin/using-crate-cron_tab-async.rs
@@ -6,10 +6,13 @@ use tokio::sync::Mutex;
 
 #[tokio::main]
 async fn main() {
-    let local_tz = Local::from_offset(&FixedOffset::east(7));
+    let local_tz =
+        Local::from_offset(&FixedOffset::east_opt(7).expect("Failed to init fixed offset"));
     let mut cron = AsyncCron::new(local_tz);
 
-    let first_job_id = cron.add_fn("* * * * * *", print_now).await;
+    cron.add_fn("* * * * * *", print_now)
+        .await
+        .expect("Failed to add fn 'print_now'.");
 
     cron.start().await;
 
@@ -23,12 +26,13 @@ async fn main() {
             println!("{} counter value: {}", now, counter);
         }
     })
-    .await;
+    .await
+    .expect("Failed to add using closure");
 
     std::thread::sleep(std::time::Duration::from_secs(10));
 
     // stop cron
-    cron.stop();
+    cron.stop().await;
 }
 
 async fn print_now() {
diff --git a/src/bin/using-crate-cron_tab-sync.rs b/src/bin/using-crate-cron_tab-sync.rs
index 98d2650..c911282 100644
--- a/src/bin/using-crate-cron_tab-sync.rs
+++ b/src/bin/using-crate-cron_tab-sync.rs
@@ -2,7 +2,8 @@ use chrono::{FixedOffset, Local, TimeZone};
 use cron_tab;
 
 fn main() {
-    let local_tz = Local::from_offset(&FixedOffset::east(7));
+    let local_tz =
+        Local::from_offset(&FixedOffset::east_opt(7).expect("Failed to init fixed offset"));
     let mut cron = cron_tab::Cron::new(local_tz);
 
     let first_job_id = cron.add_fn("* * * * * * *", print_now).unwrap();