diff --git a/Dockerfile.md b/Dockerfile.md
index 250de94..f99a005 100644
--- a/Dockerfile.md
+++ b/Dockerfile.md
@@ -13,8 +13,8 @@ You can also supply command line options like:
 Please keep in mind that any output file (--log, --html, --json etc.) will be created
 in the container. If you wish to have this created in your local directory you can mount a volume and change the output prefix e.g.:
 
-```
-docker run -t -v `pwd`:/data drwetter/testssl.sh --html --outprefix /data/ example.com
+```bash
+docker run -t -v ${PWD}:/data drwetter/testssl.sh --html --outprefix /data/ example.com
 ```
 
 Also if you don't provide a user, this docker container uses a non-root user.