diff --git a/Dockerfile b/Dockerfile
index 871637b..5669c9f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 FROM docker.io/library/nginx:alpine
 
-RUN apk add mkdocs
+RUN apk add mkdocs py3-pathspec
 
 RUN mkdir -p /opt/quadlet-examples.techtransthai.org