diff --git a/README.md b/README.md
index 4701f88..6948dfd 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # example run:
 
-    docker run -ti --rm -v some_data_volume:/data -e GIT_AUTHOR_EMAIL=a@example.com -e GIT_COMMITER_EMAIL=a@example.com hnrd/toolbox zsh
+    docker run -ti --rm -v some_data_volume:/data -v ${HOME}/.ssh/known_hosts:/root/.ssh/known_hosts:ro hnrd/toolbox