diff --git a/docker/Dockerfile.io b/docker/Dockerfile.io
index d4a9f70d..6e70f325 100644
--- a/docker/Dockerfile.io
+++ b/docker/Dockerfile.io
@@ -17,7 +17,7 @@ ARG GO_VERSION=1.21.2
 RUN apt-get update && \
     apt-get upgrade -y && \
     apt-get autoremove && \
-    apt-get install -y less ffmpeg net-tools netcat-openbsd mc iputils-ping vim neovim bat fzf locales sudo command-not-found && \
+    apt-get install -y less ffmpeg net-tools netcat-openbsd mc iputils-ping vim neovim bat fzf locales sudo command-not-found ncdu && \
     echo "> Update command-not-found database. Run 'sudo apt update' to populate it." && \
     apt-get update && \
     apt-get autoremove && \