diff --git a/README.md b/README.md
index 714435d..7306b66 100644
--- a/README.md
+++ b/README.md
@@ -25,5 +25,11 @@ Retrive the images with these URLs:
 
 You may omitt any of the parameters. Not giving any parameters will return the original image. You must always name the original picture in your URL, even if you want a different encoding.
 
+# Other possible URL-parameters:
+In addition to *encoding*, *scaleX* and *scaleY* you may also use the following parameters:
+
+    force=True/False -> apply the x/y-values as given, cut off image when necessary
+    cacheTimeout=SECONDS -> add a cache timeout header witht the given value to the response
+
 # Futher explanation
 I wrote a small article with some more example on how to best use this to optimize your website -if you want to use it for that: [Medium](https://medium.com/anti-clickbait-coalition/responsive-image-factory-f1ed6e61d13c)