1 files changed, 1 insertions, 1 deletions

diff --git a/readme.rst b/readme.rst
index 673b544..afdc342 100755
--- a/readme.rst
+++ b/readme.rst
@@ -34,7 +34,7 @@ Usage
 
 .. code-block:: bash
 
- css_merge -out ${out_file} file1.css file2.css …
+ css_merge --out ${out_file} file1.css file2.css …
 
 The file `file1.css` and `file2.css` will be combined together, the rule from
 `file2.css` overrides the one given in `file1.css`.