diff --git a/requirements.txt b/requirements.txt
index f9e76f7ef..37b602ba0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ sphinx-intl==2.1.0
 sphinx-lint==0.6.8
 sphinxcontrib-applehelp==1.0.7
 sphinxcontrib-devhelp==1.0.4
-sphinxcontrib-htmlhelp==2.0.3
+sphinxcontrib-htmlhelp==2.0.4
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.6
 sphinxcontrib-serializinghtml==1.1.9