diff --git a/autoshutdown.sh b/autoshutdown.sh
index ae85b28..d074476 100755
--- a/autoshutdown.sh
+++ b/autoshutdown.sh
@@ -16,8 +16,8 @@ silent_exitcode() {
 }
 
 extend_ttl() {
-    # Extend time to live 10 minutes at a time
-    new_ttl="$(date -d '+10 min' +%s)"
+    # Extend time to live 30 minutes at a time
+    new_ttl="$(date -d '+30 min' +%s)"
     old_ttl="$(date -d "$(cat "$LIVE_UNTIL")" +%s)"
     if [ ! -f "$LIVE_UNTIL" ] || [ "$new_ttl" -ge "$old_ttl" ]; then
         # If LIVE_UNTIL file not existing or new time to live longer