diff --git a/doc/requirements.txt b/doc/requirements.txt
index 2151ac15524..03fcef48905 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -7,5 +7,5 @@ sphinx_rtd_theme==1.0.0
 sphinxcontrib-httpdomain==1.8.0
 sphinxcontrib-openapi==0.7.0
 configobj==5.0.6
-mistune==0.8.4  # sphinxcontrib-openapi==0.7.0 cannot work with the latest mistune version (2.0.0)
+mistune==2.0.3  # sphinxcontrib-openapi==0.7.0 cannot work with the latest mistune version (2.0.0)
 MarkupSafe==2.0.1  # used by jinja2; 2.1.0 version removes soft_unicode and breaks jinja2-2.11.3