diff --git a/doc/requirements.txt b/doc/requirements.txt
index db6a939..d81f22f 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,6 +1,6 @@
 sphinx-rtd-theme==1.2.2
 sphinxcontrib-applehelp==1.0.4; python_version >= "3.5"
-sphinxcontrib-devhelp==1.0.2; python_version >= "3.5"
+sphinxcontrib-devhelp==1.0.5; python_version >= "3.5"
 sphinxcontrib-htmlhelp==2.0.1; python_version >= "3.5"
 sphinxcontrib-jsmath==1.0.1; python_version >= "3.5"
 sphinxcontrib-qthelp==1.0.3; python_version >= "3.5"