diff --git a/requirements_docs.txt b/requirements_docs.txt
index b39476859f2..e5331727ec9 100644
--- a/requirements_docs.txt
+++ b/requirements_docs.txt
@@ -1,3 +1,3 @@
-Sphinx==1.4.9
+Sphinx==1.5.1
 sphinx-autodoc-typehints==1.1.0
 sphinx-autodoc-annotation==1.0.post1