diff --git a/README.md b/README.md
index ba0552e..ca3b79a 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # simple_backup
 ## Build
 ```sh
-$ go build -o backup git.lhk.o-r.kr/freerer2/simple_backup/cmd
+$ GOOS=linux GOARCH=amd64 go build -o backup git.lhk.o-r.kr/freerer2/simple_backup/cmd
 ```
 
 ## Usage
diff --git a/build.sh b/build.sh
new file mode 100644
index 0000000..428bc4e
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,8 @@
+
+for OS in windows linux darwin; do
+  for ARCH in amd64 386 arm64; do
+    OUTPUT="backup_${OS}_${ARCH}"
+    [ $OS = "windows" ] && OUTPUT+='.exe'
+    GOOS=$OS GOARCH=$ARCH go build -o $OUTPUT git.lhk.o-r.kr/freerer2/simple_backup/cmd
+  done
+done
\ No newline at end of file