diff --git a/requirements/docs.txt b/requirements/docs.txt
index a343831000..5a29ca8c90 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -3,7 +3,7 @@
 # documentation.
 
 # Needed to build RTD docs
-sphinx==1.5.3
+sphinx==1.5.5
 sphinx-rtd-theme==0.1.9
 
 # Needed to build markdown docs