diff --git a/docs_requirements.txt b/docs_requirements.txt
index 3f7bad5..cfd1bcd 100644
--- a/docs_requirements.txt
+++ b/docs_requirements.txt
@@ -7,7 +7,7 @@ nbformat==5.8.0
 nbsphinx==0.9.1
 sphinx-jsonschema==1.19.1
 sphinx-rtd-theme==1.2.0
-sphinxcontrib-applehelp==1.0.2
+sphinxcontrib-applehelp==1.0.4
 sphinxcontrib-devhelp==1.0.2
 sphinxcontrib-htmlhelp==2.0.1
 sphinxcontrib-jsmath==1.0.1