diff --git a/GUIDE.md b/GUIDE.md
index b6222e7..eaf47c3 100644
--- a/GUIDE.md
+++ b/GUIDE.md
@@ -31,7 +31,7 @@ func run() error {
 			// Command "server"
 			Name:        "server",
 			Description: "run mock server",
-			Do: func(ctx context.Context, args []string) error {
+			ExecFunc: func(ctx context.Context, args []string) error {
 				cfg := config.NewConfig()
                 
 				// Argument ./openapi.yml
diff --git a/README.md b/README.md
index 7fccf47..929aaf6 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ cmds := []acmd.Command{
 	{
 		Name:        "now",
 		Description: "prints current time",
-		Do: func(ctx context.Context, args []string) error {
+		ExecFunc: func(ctx context.Context, args []string) error {
 			fmt.Printf("now: %s\n", now.Format("15:04:05"))
 			return nil
 		},
@@ -46,7 +46,7 @@ cmds := []acmd.Command{
 	{
 		Name:        "status",
 		Description: "prints status of the system",
-		Do: func(ctx context.Context, args []string) error {
+		ExecFunc: func(ctx context.Context, args []string) error {
 			// do something with ctx :)
 			return nil
 		},
diff --git a/acmd.go b/acmd.go
index 83703b6..582616b 100644
--- a/acmd.go
+++ b/acmd.go
@@ -37,10 +37,6 @@ type Command struct {
 	// Description of the command.
 	Description string
 
-	// Do will be invoked.
-	// Deprecated: use ExecFunc or Exec.
-	Do func(ctx context.Context, args []string) error
-
 	// ExecFunc represents the command function.
 	// Use Exec if you have struct implementing this function.
 	ExecFunc func(ctx context.Context, args []string) error
@@ -68,9 +64,6 @@ type FlagsGetter interface {
 // simple way to get exec function
 func (cmd *Command) getExec() func(ctx context.Context, args []string) error {
 	switch {
-	case cmd.Do != nil:
-		cmd.ExecFunc = cmd.Do
-		fallthrough
 	case cmd.ExecFunc != nil:
 		return cmd.ExecFunc
 	case cmd.Exec != nil:
diff --git a/acmd_test.go b/acmd_test.go
index 00a57e3..a55fd3b 100644
--- a/acmd_test.go
+++ b/acmd_test.go
@@ -354,28 +354,6 @@ func TestCommand_IsHidden(t *testing.T) {
 	}
 }
 
-func TestDoShouldWork(t *testing.T) {
-	var ok bool
-
-	cmds := []Command{
-		{
-			Name: "foo",
-			Do: func(ctx context.Context, args []string) error {
-				ok = true
-				return nil
-			},
-		},
-	}
-
-	r := RunnerOf(cmds, Config{
-		Args:    []string{"./someapp", "foo"},
-		AppName: "myapp",
-	})
-
-	failIfErr(t, r.Run())
-	mustEqual(t, ok, true)
-}
-
 func TestExit(t *testing.T) {
 	wantStatus := 42
 	wantOutput := "myapp: code 42\n"