fix readme

README.md

@@ -88,9 +88,9 @@ Shell
 Using with Celery
 -----------------
 
-By default compress_field use Celery if Celery are installed on Site Packages.
-You just need create one post_save on your model to start compress. If you wanna
-auto compress after save.
+If Celery are installed on Site Packages. You just need create one post_save on
+your model to use async compress.
+
 
 ```python
 # listeners.py file
@@ -104,6 +104,18 @@ post_save.connect(auto_compress_file_on_post_save, sender=MyContent)
 
 ```
 
+If you don´t wanna use Celery async compress:
+
+
+```python
+
+def auto_compress_file_on_post_save(sender, instance, **kargs):
+    instance.upload_file.compress(async=False)
+
+post_save.connect(auto_compress_file_on_post_save, sender=MyContent)
+
+```
+
 
 Developer
 ---------