diff --git a/requirements.txt b/requirements.txt
index a5c61d53b..ccfcd906e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ h5py>=2.7
 scipy>=0.16
 numba
 
-pytest>=3.6
+pytest>=9.1.1
 nbval>=0.9.0
 pytest-cov>=2.6.0