diff --git a/README.md b/README.md
index 45afe5d6..f7d7f63a 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ ezBookkeeping will listen at port 8080 as default. Then you can visit http://{YO
 ### Build from source
 Make sure you have [Golang](https://golang.org/), [GCC](http://gcc.gnu.org/), [Node.js](https://nodejs.org/) and [NPM](https://www.npmjs.com/) installed. Then download the source code, and follow these steps:
 
-    $ ./build.sh package -f ezbookkeeping.tar.gz
+    $ ./build.sh package -o ezbookkeeping.tar.gz
 
 All the files will be packaged in `ezbookkeeping.tar.gz`.
 
diff --git a/build.sh b/build.sh
index d479afab..c773508e 100755
--- a/build.sh
+++ b/build.sh
@@ -38,7 +38,7 @@ Types:
 
 Options:
     -r, --release       Build release (The script will use environment variable "RELEASE_BUILD" to detect whether this is release building by default)
-    -f, --file          Package file name (For "package" type only)
+    -o, --output        Package file name (For "package" type only)
     -t, --tag           Docker tag (For "docker" type only)
     -h, --help          Show help
 EOF
@@ -55,7 +55,7 @@ parse_args() {
             --release | -r)
                 RELEASE="1"
                 ;;
-            --file | -f)
+            --output | -o)
                 PACKAGE_FILENAME="$2"
                 shift
                 ;;