diff --git a/requirements-dev.txt b/requirements-dev.txt
index 9ae29d8..494d47b 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -3,4 +3,4 @@
 coveralls==2.0.0
 pytest==5.4.2
 pytest-cov==2.9.0
-pytest-mock==3.1.0
+pytest-mock==3.3.1