diff --git a/README.md b/README.md
index 8fbcfea..44977b0 100644
--- a/README.md
+++ b/README.md
@@ -187,7 +187,7 @@ The docker-gc container requires access to the docker socket in order to
 function, so you need to map it when running, e.g.:
 
 ```sh
-docker run --rm -v /var/run/docker.sock:/var/run/docker.sock -v /etc:/etc:ro spotify/docker-gc
+docker run --rm --privileged -v /var/run/docker.sock:/var/run/docker.sock -v /etc:/etc:ro spotify/docker-gc
 ```
 
 The `/etc` directory is also mapped so that it can read any exclude files