diff --git a/requirements_docs.txt b/requirements_docs.txt
index b39476859f2e1a685174a947d79125fd5055fcab..e5331727ec92aa0360ddb8e8590ff9c83f1c3171 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