diff --git a/Dockerfile b/Dockerfile
index 5589ee7..9ea19d6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,4 +8,6 @@ WORKDIR /docs
 
 RUN apk add --no-cache curl
 
-RUN pip install mkdocs-awesome-pages-plugin mkdocs-material-extensions
+RUN pip install \
+  mkdocs-awesome-pages-plugin==2.9.1 \
+  mkdocs-material-extensions==1.1.1