diff --git a/src/main.rs b/src/main.rs
index b4ed8d6..4849481 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -14,7 +14,7 @@ fn main() {
 ///
 /// Default time settings are 25 minutes for a working block and 5 minutes for a break.
 fn run() -> Result<()> {
-    let work_duration = Duration::seconds(if cfg!(debug_assertions) { 5 } else { 25 * 60 });
+    let work_duration = Duration::seconds(if cfg!(debug_assertions) { 75 } else { 25 * 60 });
     let break_duration = Duration::seconds(if cfg!(debug_assertions) { 5 } else { 5 * 60 });
 
     loop {
@@ -54,9 +54,9 @@ fn timer(name: &str, after_msg: &str, duration: &Duration) -> Result<()> {
         }
 
         let elapsed_time: NaiveTime = NaiveTime::from_hms(
-            elapsed.num_hours() as u32,
-            elapsed.num_minutes() as u32,
-            elapsed.num_seconds() as u32,
+            (elapsed.num_hours() % 24) as u32,
+            (elapsed.num_minutes() % 60) as u32,
+            (elapsed.num_seconds() % 60) as u32,
         );
         write!(out, "Time elapsed: {}", elapsed_time.format(TIME_FORMAT))?;
         out.flush().unwrap();