diff --git a/docs/requirements.txt b/docs/requirements.txt
index f69696c026..6ee338ff58 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -21,7 +21,7 @@ sphinx-rtd-theme==1.2.2
 sphinxcontrib-applehelp==1.0.7
 sphinxcontrib-devhelp==1.0.5
 sphinxcontrib-serializinghtml==1.1.9
-sphinxcontrib-htmlhelp==2.0.1
+sphinxcontrib-htmlhelp==2.0.4
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.6
 urllib3==2.0.4