diff --git a/branches.go b/branches.go
index 4fa85b8..490fd16 100644
--- a/branches.go
+++ b/branches.go
@@ -65,7 +65,7 @@ func (repo *Repo) GetTagHash(t string) string {
 }
 
 // lookup a hash from a tag with 'git rev-list'
-func (repo *Repo) GetBranchDifferences(from string, to string) []string {
+func (repo *Repo) GetBranchDifferences(to string, from string) []string {
 	// git rev-list -n 1 v0.0.66
 	cmd := []string{"git", "rev-list", to + "..." + from}
 	result, _ := repo.RunStrict(cmd)