diff --git a/cmd_bind.go b/cmd_bind.go
index bee9872..c674684 100644
--- a/cmd_bind.go
+++ b/cmd_bind.go
@@ -31,7 +31,7 @@ ex:
 		Flag: *flag.NewFlagSet("gopy-bind", flag.ExitOnError),
 	}
 
-	cmd.Flag.String("lang", defaultPyVersion, "python version to use for bindings (python2|py2|python3|py3)")
+	cmd.Flag.String("lang", defaultPyVersion, "python version to use for bindings (python2|py2|python3|py3|cffi)")
 	cmd.Flag.String("output", "", "output directory for bindings")
 	cmd.Flag.Bool("symbols", true, "include symbols in output")
 	cmd.Flag.Bool("work", false, "print the name of temporary work directory and do not delete it when exiting")
diff --git a/main.go b/main.go
index c8d1eec..b57b824 100644
--- a/main.go
+++ b/main.go
@@ -13,7 +13,7 @@ import (
 )
 
 const (
-	defaultPyVersion = "py2"
+	defaultPyVersion = "cffi"
 )
 
 var (