diff --git a/requirements_dev.txt b/requirements_dev.txt
index ef46a8f..60c819d 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -10,7 +10,7 @@ twine==1.12.1
 
 pytest==4.5.0
 pytest-runner==4.2
-pytest-mock==1.10.0
+pytest-mock==3.13.0
 
 black==19.3b0
 sphinx_rtd_theme==0.4.2