diff --git a/doc-requirements.txt b/doc-requirements.txt
index 7387426..359c059 100644
--- a/doc-requirements.txt
+++ b/doc-requirements.txt
@@ -1,4 +1,4 @@
 sphinx>=1.3
 sphinxcontrib-napoleon>=0.4.3
-mock==4.0.2
+mock==4.0.3
 sphinx_rtd_theme==0.5.0