diff --git a/doc-requirements.txt b/doc-requirements.txt
index 00334b4..d72e436 100644
--- a/doc-requirements.txt
+++ b/doc-requirements.txt
@@ -1,4 +1,4 @@
 sphinx>=1.3
 sphinxcontrib-napoleon>=0.4.3
-mock==4.0.3
+mock==5.0.2
 sphinx_rtd_theme==1.0.0