diff --git a/pyproject.toml b/pyproject.toml
index 53f4ebf..732a8dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,7 +50,7 @@ coveralls = [
 ]
 pytest-cov = "~2.12.0"
 flake8 = ">=3.6.0"
-mock = "^3.0.5"
+mock = "^5.0.0"
 bumpversion = "^0.5.0"
 sphinx = ">=1.8.4"
 sphinx-rtd-theme = "^0.4.0"