diff --git a/docker/default_task.sh b/docker/default_task.sh
index 8cb208ca..ddbad55f 100644
--- a/docker/default_task.sh
+++ b/docker/default_task.sh
@@ -108,7 +108,7 @@ echo "当前小时:${current_h}"
 remainder_h=`expr $current_h % 8`
 
 
-case $remainder_h in
+case ${remainder_h} in
     0)  run_hour="0,8,16"
     ;;
     1)  run_hour="1,9,17"