diff --git a/README.md b/README.md
index a8e04e4..e9ba094 100644
--- a/README.md
+++ b/README.md
@@ -108,7 +108,7 @@ Flags:
   -d, --duration=DURATION      Duration of test, examples: -d 10s -d 3m
   -i, --interval=200ms         Print snapshot result every interval, use 0 to print once at the end
       --seconds                Use seconds as time unit to print
-      --body=BODY              HTTP request body, if start the body with @, the rest should be a filename to read
+  -b, --body=BODY              HTTP request body, if start the body with @, the rest should be a filename to read
       --stream                 Specify whether to stream file specified by '--body @file' using chunked encoding or to read into memory
   -m, --method="GET"           HTTP method
   -H, --header=K:V ...         Custom HTTP headers
@@ -146,6 +146,15 @@ POST a json file:
 plow https://httpbin.org/post -c 20 --body @file.json -T 'application/json' -m POST
 ```
 
+### Bash/ZSH Shell Completion
+
+```bash
+# Add the statement to their bash_profile (or equivalent):
+eval "$(plow --completion-script-bash)"
+# Or for ZSH
+eval "$(plow --completion-script-zsh)"
+```
+
 ## Stargazers
 
 [![Stargazers over time](https://starchart.cc/six-ddc/plow.svg)](https://starchart.cc/six-ddc/plow)
diff --git a/go.mod b/go.mod
index dda51ff..5a2de9d 100644
--- a/go.mod
+++ b/go.mod
@@ -16,6 +16,8 @@ require (
 	github.com/valyala/fasthttp v1.27.0
 	go.uber.org/automaxprocs v1.4.0
 	golang.org/x/net v0.0.0-20210525063256-abc453219eb5 // indirect
+	golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 // indirect
 	gopkg.in/alecthomas/kingpin.v3-unstable v3.0.0-20191105091915-95d230a53780
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
diff --git a/go.sum b/go.sum
index a0bb47b..9088c03 100644
--- a/go.sum
+++ b/go.sum
@@ -54,8 +54,9 @@ golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qx
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210514084401-e8d321eab015 h1:hZR0X1kPW+nwyJ9xRxqZk1vx5RUObAPBdKVvXPDUH/E=
 golang.org/x/sys v0.0.0-20210514084401-e8d321eab015/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40 h1:JWgyZ1qgdTaF3N3oxC+MdTV7qvEEgHo3otj+HB5CM7Q=
+golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
@@ -64,8 +65,9 @@ golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGm
 gopkg.in/alecthomas/kingpin.v3-unstable v3.0.0-20191105091915-95d230a53780 h1:CEBpW6C191eozfEuWdUmIAHn7lwlLxJ7HVdr2e2Tsrw=
 gopkg.in/alecthomas/kingpin.v3-unstable v3.0.0-20191105091915-95d230a53780/go.mod h1:3HH7i1SgMqlzxCcBmUHW657sD4Kvv9sC3HpL3YukzwA=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
diff --git a/main.go b/main.go
index eb0a4b6..561ded4 100644
--- a/main.go
+++ b/main.go
@@ -17,7 +17,7 @@ var (
 	interval    = kingpin.Flag("interval", "Print snapshot result every interval, use 0 to print once at the end").Short('i').Default("200ms").Duration()
 	seconds     = kingpin.Flag("seconds", "Use seconds as time unit to print").Bool()
 
-	body        = kingpin.Flag("body", "HTTP request body, if start the body with @, the rest should be a filename to read").String()
+	body        = kingpin.Flag("body", "HTTP request body, if start the body with @, the rest should be a filename to read").Short('b').String()
 	stream      = kingpin.Flag("stream", "Specify whether to stream file specified by '--body @file' using chunked encoding or to read into memory").Default("false").Bool()
 	method      = kingpin.Flag("method", "HTTP method").Default("GET").Short('m').String()
 	headers     = kingpin.Flag("header", "Custom HTTP headers").Short('H').PlaceHolder("K:V").Strings()