diff --git a/scripts/robot.sh b/scripts/robot.sh
index 328ad8c..b0352d4 100755
--- a/scripts/robot.sh
+++ b/scripts/robot.sh
@@ -5,7 +5,7 @@ then
     find /opt/TOPISTO/data/btcspy/data/json -type f -mtime +3 -exec rm {} \;
 
 
-    for BLOCK in `ls -ltr /opt/TOPISTO/data/btcspy/data/simpledb/blocks`
+    for BLOCK in `ls -tr /opt/TOPISTO/data/btcspy/data/simpledb/blocks`
     do
         if [ ! -f /opt/TOPISTO/data/btcspy/data/json/$BLOCK.json ];
         then