diff --git a/putzen.sh b/putzen.sh
index 652ee23..31b8f64 100644
--- a/putzen.sh
+++ b/putzen.sh
@@ -7,7 +7,7 @@ else
     week=$1
 fi
 
-current_week=$(date +%V)
+current_week=$(date +%V | sed s/^0//) # sed is to remove leading zeros to avoid interpreting as octal number in next line
 next_week=$((current_week + 1))
 if [ "$next_week" -gt 52 ]; then
     next_week=1