diff --git a/samples/docker/Dockerfile b/samples/docker/Dockerfile
index ae54da57..307af80f 100644
--- a/samples/docker/Dockerfile
+++ b/samples/docker/Dockerfile
@@ -1,5 +1,5 @@
 # Use the latest DITA-OT image ↓ as parent:
-FROM ghcr.io/dita-ot/dita-ot:4.2.3
+FROM ghcr.io/dita-ot/dita-ot:4.2.4
 
 # Install a custom plug-in from a remote location:
 RUN dita --install https://github.com/infotexture/dita-bootstrap/archive/master.zip