diff --git a/requirements_dev.txt b/requirements_dev.txt
index 6b2d9cc3b..adf4d7434 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,7 +8,7 @@ pillow==8.4.0
 pytest==6.2.5
 pytest-cache==1.0
 pytest-cov==3.0.0
-pytest-mock<3.6.2
+pytest-mock<3.9.1
 recommonmark==0.7.1
 requests==2.26.0
 requests-mock==1.9.3