diff --git a/lab/Dockerfile b/lab/Dockerfile
index b6466d3..199d0f5 100644
--- a/lab/Dockerfile
+++ b/lab/Dockerfile
@@ -9,6 +9,7 @@ RUN apk add --no-cache \
     helix \
     openssh \
     sudo \
+    shadow \
     zsh \
     ca-certificates \
     busybox-extras \