diff --git a/Docker-container-on-Ubuntu-16.04-LTS.md b/Docker-container-on-Ubuntu-16.04-LTS.md
index 1e2c3fd..5b9185e 100644
--- a/Docker-container-on-Ubuntu-16.04-LTS.md
+++ b/Docker-container-on-Ubuntu-16.04-LTS.md
@@ -146,5 +146,5 @@ sudo docker ps -a -f status=exited -q | xargs -r sudo docker rm
 sudo docker images --no-trunc -q -f dangling=true | xargs -r sudo docker rmi
 
 # Remove dangling volumes
-sudo docker volume ls -qf dangling=true | xargs -r docker volume rm
+sudo docker volume ls -qf dangling=true | xargs -r sudo docker volume rm
 ```
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