diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9d0e99843..123531f23 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ flake8==3.7.7
 flake8-type-annotations==0.1.0
 flake8-tidy-imports==2.0.0
 pytest==4.4.1
-pytest-mock==1.10.3
+pytest-mock==1.10.4
 pytest-asyncio==0.10.0
 pytest-cov==2.6.1
 coveralls==1.7.0