diff --git a/requirements-dev.txt b/requirements-dev.txt
index 16de94f..726c7da 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,7 +3,7 @@ flake8==3.7.9
 async-timeout==3.0.1
 pytest==5.3.1
 pytest-cov==2.8.1
-pytest-mock==1.12.1
+pytest-mock==1.13.0
 coverage==4.5.4
 sphinx==2.2.2
 pep257==0.7.0