diff --git a/README.rst b/README.rst
index e3aaaf3..e8f05fb 100644
--- a/README.rst
+++ b/README.rst
@@ -28,7 +28,7 @@ Perform custom action
     from sweeper import iter_file_dups
     for files in iter_file_dups(['images']):
         for fname in files:
-            print('found duplicate file with name: %s' % fname)
+            print('found duplicate file with name: {}'.format(fname))
 
 As script::