diff --git a/requirements-dev.txt b/requirements-dev.txt
index 413c5da..ff64acf 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,7 +3,7 @@ flake8==3.8.3
 async-timeout==3.0.1
 pytest==6.0.1
 pytest-cov==2.10.1
-pytest-mock==3.3.0
+pytest-mock==3.3.1
 coverage==5.2.1
 sphinx==3.2.1
 pep257==0.7.0