diff --git a/doc/requirements.txt b/doc/requirements.txt
index 0ae3069..20efa5d 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,6 +1,6 @@
 sphinx-rtd-theme==2.0.0
 sphinxcontrib-applehelp==1.0.4
-sphinxcontrib-devhelp==1.0.2
+sphinxcontrib-devhelp==1.0.5
 sphinxcontrib-htmlhelp==2.0.1
 sphinxcontrib-jquery==4.1
 sphinxcontrib-jsmath==1.0.1