diff --git a/requirements.txt b/requirements.txt
index 486ced66..082e838e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-mock==3.0.4
+mock==3.0.5
 sphinx==1.7.5 # pyup: ignore
 sphinx_rtd_theme==0.4.3
 numpy==1.16.3