diff --git a/requirements.txt b/requirements.txt
index 0db0861ca..5e2e27f59 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ flake8==3.7.7
 # ------------------------------------------------------------------------------
 tox==3.12.1
 pytest==4.6.3
-pytest_cases==1.9.0
+pytest_cases==1.9.1
 pytest-cookies==0.3.0
 pytest-xdist==1.29.0
 pyyaml==5.1.1