diff --git a/script/download_model.ps1 b/script/download_model.ps1
index 38e6a027..78f72df0 100644
--- a/script/download_model.ps1
+++ b/script/download_model.ps1
@@ -3,17 +3,17 @@ param(
 )
 mkdir $model
 cd $model
-$block_num = 28
+$block_num = 27
 if ($model.Contains('7b')) {
-    $block_num = 32
+    $block_num = 31
 }
 if ($model.Contains('1.8b')) {
-    $block_num = 24
+    $block_num = 23
 }
 Invoke-WebRequest -Uri https://github.com/wangzhaode/mnn-llm/releases/download/$model-mnn/tokenizer.txt -OutFile tokenizer.txt
 Invoke-WebRequest -Uri https://github.com/wangzhaode/mnn-llm/releases/download/$model-mnn/embedding.mnn -OutFile embedding.mnn
 Invoke-WebRequest -Uri https://github.com/wangzhaode/mnn-llm/releases/download/$model-mnn/lm.mnn -OutFile lm.mnn
-for ($i=1; $i -lt $block_num; $i=$i+1) {
+for ($i=0; $i -lt $block_num; $i=$i+1) {
     Invoke-WebRequest -Uri https://github.com/wangzhaode/mnn-llm/releases/download/$model-mnn/block_$i.mnn  -OutFile  block_$i.mnn
 }
 cd ..
diff --git a/script/download_model.sh b/script/download_model.sh
index ae720134..82ae78d6 100755
--- a/script/download_model.sh
+++ b/script/download_model.sh
@@ -13,7 +13,7 @@ if [ $is_7b ]; then
     block_num=31
 fi
 if [ $is_1_8b ]; then
-    block_num=24
+    block_num=23
 fi
 # download models
 wget -c -nv https://github.com/wangzhaode/mnn-llm/releases/download/$model-mnn/tokenizer.txt
@@ -23,4 +23,4 @@ for i in `seq 0 $block_num`
 do
     wget -c -nv https://github.com/wangzhaode/mnn-llm/releases/download/$model-mnn/block_$i.mnn
 done
-cd ..
\ No newline at end of file
+cd ..