diff --git a/deploy-docs/mkdocs-requirements.txt b/deploy-docs/mkdocs-requirements.txt
index ac3cf10a..05acfe04 100755
--- a/deploy-docs/mkdocs-requirements.txt
+++ b/deploy-docs/mkdocs-requirements.txt
@@ -10,6 +10,7 @@ mkdocs-same-dir
 mkdocs-static-i18n
 mkdocs-video
 mike
+pathspec
 plantuml-markdown
 pymdown-extensions
 python-markdown-math