diff --git a/docs/requirements.txt b/docs/requirements.txt
index 1e9ec06a48..3b6aac17bf 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -20,7 +20,7 @@ sphinx-favicon==1.0.1
 sphinx-rtd-theme==2.0.0
 sphinxcontrib-applehelp==1.0.7
 sphinxcontrib-devhelp==1.0.5
-sphinxcontrib-htmlhelp==2.0.4
+sphinxcontrib-htmlhelp==2.0.5
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.6
 sphinxcontrib-serializinghtml==1.1.9