diff --git a/cal/main.go b/cal/main.go
index 84ef091..48ba4cc 100644
--- a/cal/main.go
+++ b/cal/main.go
@@ -6,6 +6,7 @@ import (
 	"path/filepath"
 	"time"
 
+	"github.com/urfave/cli/v2"
 	"gopkg.in/yaml.v3"
 )
 
@@ -27,23 +28,25 @@ func main() {
 		os.Exit(1)
 	}
 
-	if len(os.Args) < 2 {
-		fmt.Println("need a sub command")
-		os.Exit(1)
+	app := &cli.App{
+		Name:  "list",
+		Usage: "list all events",
+		Action: func(*cli.Context) error {
+			all, err := repo.FindAll()
+			if err != nil {
+				return err
+			}
+			for _, e := range all {
+				fmt.Printf("%s\t%s\t%s\t%s\n", e.ID, e.Title, e.Start.Format(time.DateTime), e.Duration.String())
+			}
+
+			return nil
+		},
 	}
 
-	switch os.Args[1] {
-	case "list":
-		all, err := repo.FindAll()
-		if err != nil {
-			fmt.Println(err)
-			os.Exit(1)
-		}
-		for _, e := range all {
-			fmt.Printf("%s\t%s\t%s\t%s\n", e.ID, e.Title, e.Start.Format(time.DateTime), e.Duration.String())
-		}
-	default:
-		fmt.Printf("unkown command %s\n", os.Args[1])
+	if err := app.Run(os.Args); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
 	}
 
 	// one := item.Event{
diff --git a/go.mod b/go.mod
index b90d726..b5172fe 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module go-mod.ewintr.nl/planner
 go 1.21.5
 
 require (
+	github.com/cpuguy83/go-md2man/v2 v2.0.4 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
@@ -11,6 +12,9 @@ require (
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/ncruces/go-strftime v0.1.9 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/urfave/cli/v2 v2.27.4 // indirect
+	github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
 	golang.org/x/sys v0.22.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	modernc.org/gc/v3 v3.0.0-20240107210532-573471604cb6 // indirect
diff --git a/go.sum b/go.sum
index 5eeabd8..9e5d242 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.4 h1:wfIWP927BUkWJb2NmU/kNDYIBTh/ziUX91+lVfRxZq4=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
@@ -14,6 +16,12 @@ github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdh
 github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/urfave/cli/v2 v2.27.4 h1:o1owoI+02Eb+K107p27wEX9Bb8eqIoZCfLXloLUSWJ8=
+github.com/urfave/cli/v2 v2.27.4/go.mod h1:m4QzxcD2qpra4z7WhzEGn74WZLViBnMpb1ToCAKdGRQ=
+github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 h1:gEOO8jv9F4OT7lGCjxCBTO/36wtF6j2nSip77qHd4x4=
+github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1/go.mod h1:Ohn+xnUBiLI6FVj/9LpzZWtj1/D6lUovWYBkxHVV3aM=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
 golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=