diff --git a/src/engine/workthreads/MineThread.java b/src/engine/workthreads/MineThread.java
index 6f99a55e..281e21f0 100644
--- a/src/engine/workthreads/MineThread.java
+++ b/src/engine/workthreads/MineThread.java
@@ -22,7 +22,7 @@ public class MineThread  implements Runnable {
     }
     @Override
     public void run() {
-        LocalDateTime nextPulse = LocalDateTime.now().withMinute(0).withSecond(0);
+        LocalDateTime nextPulse = LocalDateTime.now().withMinute(0).withSecond(0).withNano(0);
         while (true){
             if(LocalDateTime.now().isAfter(nextPulse)) {
                 for (Mine mine : Mine.getMines()) {
@@ -42,7 +42,7 @@ public class MineThread  implements Runnable {
                         minute = 30;
 
                     LocalDateTime openTime = LocalDateTime.now().withHour(mine.liveTime).withMinute(minute).withSecond(0);
-                    LocalDateTime closeTime = openTime.plusMinutes(30);
+                    LocalDateTime closeTime = openTime.plusMinutes(29);
 
                     //current time is after start time and before close time, open mine window
                     if (LocalDateTime.now().isAfter(openTime.minusMinutes(1)) && !mine.wasClaimed && !mine.wasOpened) {