diff --git a/mkdocs.dockerfile b/mkdocs.dockerfile
index 1f87681..482b9d7 100644
--- a/mkdocs.dockerfile
+++ b/mkdocs.dockerfile
@@ -5,7 +5,7 @@ RUN sed -i "s@http://.*archive.ubuntu.com@http://mirrors.tuna.tsinghua.edu.cn@g"
     sed -i "s@http://.*security.ubuntu.com@http://mirrors.tuna.tsinghua.edu.cn@g" /etc/apt/sources.list && \
     apt-get update
 RUN apt-get install -y --no-install-recommends vim python3 pip
-RUN pip install mkdocs mkdocs-material -i https://pypi.tuna.tsinghua.edu.cn/simple
+RUN pip install mkdocs mkdocs-material mkdocs-encryptcontent-plugin -i https://pypi.tuna.tsinghua.edu.cn/simple
 
 
 # docker build -f mkdocs.dockerfile -t mkdocs .
\ No newline at end of file