diff --git a/argv.go b/argv.go
index 9c458eb..41af3c3 100644
--- a/argv.go
+++ b/argv.go
@@ -9,8 +9,9 @@ package main
 var argv args
 
 type args struct {
-	Base string  `arg:"--base"                     help:"basename"`
-	Proto string `arg:"--proto"                    help:"the .proto filename"`
+	LoBase string `arg:"--lobase"                   help:"lowercase basename"`
+	UpBase string `arg:"--upbase"                   help:"uppercase basename"`
+	Proto  string `arg:"--proto"                    help:"the .proto filename"`
 }
 
 func (a args) Description() string {
diff --git a/main.go b/main.go
index cf03e66..5390e9c 100644
--- a/main.go
+++ b/main.go
@@ -18,12 +18,6 @@ var BUILDTIME string
 func main() {
 	pp := arg.MustParse(&argv)
 
-	// for very new users or users unfamilar with the command line, this may help them
-	if argv.Base == "help" || argv.Base == "?" {
-		pp.WriteHelp(os.Stdout)
-		os.Exit(-1)
-	}
-
 	// you need a proto file
 	if argv.Proto == "" {
 		log.Info("you must provide --proto <filename>")
@@ -35,11 +29,17 @@ func main() {
 		os.Exit(-1)
 	}
 
-	if ! strings.HasSuffix(argv.Proto, ".proto") {
+	if !strings.HasSuffix(argv.Proto, ".proto") {
 		log.Info("protobuf", argv.Proto, "must end in .proto")
 		os.Exit(-1)
 	}
 
+	// you need --upbase and --lobase
+	if argv.UpBase == "" {
+		pp.WriteHelp(os.Stdout)
+		os.Exit(-1)
+	}
+
 	cmd := []string{"go", "list", "-f", "'{{.Name}}'"}
 	result := shell.Run(cmd)
 
@@ -50,13 +50,13 @@ func main() {
 
 	protobase := strings.TrimSuffix(argv.Proto, ".proto")
 
-	f, _ := os.OpenFile(protobase + ".sort.pb.go", os.O_WRONLY|os.O_CREATE, 0600)
+	f, _ := os.OpenFile(protobase+".sort.pb.go", os.O_WRONLY|os.O_CREATE, 0600)
 
 	sortmap := make(map[string]string)
 	sortmap["package"] = packageName
-	sortmap["base"] = "gitTag"
+	sortmap["base"] = argv.LoBase
 	sortmap["lock"] = sortmap["base"] + "slock"
-	sortmap["Base"] = "GitTag"
+	sortmap["Base"] = argv.UpBase
 	sortmap["Bases"] = sortmap["Base"] + "s"
 
 	sortmap["sortBy"] = "ByPath"
diff --git a/testautogen/Makefile b/testautogen/Makefile
index bd33133..534167e 100644
--- a/testautogen/Makefile
+++ b/testautogen/Makefile
@@ -6,7 +6,7 @@ test: vet
 all: clean test.pb.go run goimports vet
 
 run:
-	../autogenpb --proto test.proto
+	../autogenpb --proto test.proto --lobase gitTag --upbase GitTag
 
 vet:
 	@GO111MODULE=off go vet