diff --git a/admin/doc-requirements.txt b/admin/doc-requirements.txt
index 4a9090436e4df4..a365edf1bb9d87 100644
--- a/admin/doc-requirements.txt
+++ b/admin/doc-requirements.txt
@@ -11,3 +11,4 @@ sphinx-prompt
 Sphinx-Substitution-Extensions
 typed-ast
 sphinxcontrib-openapi
+mistune < 2.0.0