diff --git a/script/build.sh b/script/build.sh
index 2eb3e1a..14db397 100755
--- a/script/build.sh
+++ b/script/build.sh
@@ -21,10 +21,11 @@ if [[ "$OSTYPE" =~ ^darwin ]]; then
         mkdir output/macos
     fi
 fi
-SHELL_FOLDER=$(cd "$(dirname "$0")";pwd)
+
+SHELL_FOLDER=$(cd "$(dirname "$0")" || exit 1; pwd)
 # total app number, ignore first line
-export total=`sed -n '$=' app.csv`
-total=$(($total-1))
+total=$(sed -n '$=' app.csv)
+export total=$((total-1))
 export index=1
 
 old_name="weread"
@@ -38,13 +39,12 @@ if [[ "$OSTYPE" =~ ^linux ]]; then
     echo "Build for Linux"
     echo "==============="
     export sd=${SHELL_FOLDER}/sd-linux-x64
-    chmod +x $sd
+    chmod +x "$sd"
     # for linux, package name may be com.xxx.xxx
     echo "rename package name"
     export desktop_file="src-tauri/assets/${package_prefix}.weread.desktop"
     # sed -i "s/\"productName\": \"weread\"/\"productName\": \"${package_prefix}-weread\"/g" src-tauri/tauri.conf.json
     $sd "\"productName\": \"weread\"" "\"productName\": \"${package_prefix}-weread\"" src-tauri/tauri.conf.json
-
 fi
 
 if [[ "$OSTYPE" =~ ^darwin ]]; then
@@ -53,7 +53,7 @@ if [[ "$OSTYPE" =~ ^darwin ]]; then
     echo "==============="
 
     export sd=${SHELL_FOLDER}/sd-apple-x64
-    chmod +x $sd
+    chmod +x "$sd"
     echo "rename package name"
     $sd "\"productName\": \"weread\"" "\"productName\": \"WeRead\"" src-tauri/tauri.conf.json
 fi
@@ -66,14 +66,14 @@ do
     url=${arr[3]}
     echo "update package name and url"
     # replace package info
-    $sd ${old_url} ${url} src-tauri/tauri.conf.json
-    $sd ${old_name} ${package_name} src-tauri/tauri.conf.json
+    $sd "${old_url}" "${url}" src-tauri/tauri.conf.json
+    $sd "${old_name}" "${package_name}" src-tauri/tauri.conf.json
     echo "update ico with 32x32 pictue"
-    $sd ${old_name} ${package_name} src-tauri/src/main.rs
+    $sd "${old_name}" "${package_name}" src-tauri/src/main.rs
 
     # for apple, need replace title
     if [[ "$OSTYPE" =~ ^darwin ]]; then
-        $sd ${old_title} ${package_title} src-tauri/tauri.conf.json
+        $sd "${old_title}" "${package_title}" src-tauri/tauri.conf.json
     fi
 
     # echo "update ico with 32x32 pictue"
@@ -83,9 +83,9 @@ do
         echo "update desktop"
         old_desktop="src-tauri/assets/${package_prefix}-${old_name}.desktop"
         new_desktop="src-tauri/assets/${package_prefix}-${package_name}.desktop"
-        mv ${old_desktop}  ${new_desktop}
-        $sd ${old_zh_name} ${package_zh_name} ${new_desktop}
-        $sd ${old_name} ${package_name} ${new_desktop}
+        mv "${old_desktop}" "${new_desktop}"
+        $sd "${old_zh_name}" "${package_zh_name}" "${new_desktop}"
+        $sd "${old_name}" "${package_name}" "${new_desktop}"
     fi
 
     # update package info
@@ -98,7 +98,7 @@ do
     echo "package name is ${package_name} (${package_zh_name})"
     npm run tauri build
     echo "package build success!"
-    index=$(($index+1))
+    index=$((index+1))
 
     if [[ "$OSTYPE" =~ ^linux ]]; then
         mv src-tauri/target/release/bundle/deb/*.deb output/linux