diff --git a/requirements_dev.txt b/requirements_dev.txt
index ff4db0a..c5700f3 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -18,7 +18,7 @@ pluggy==1.5.0
     # via pytest
 py==1.11.0
     # via dials-data (pyproject.toml)
-pytest==7.4.2
+pytest==9.0.3
     # via dials-data (pyproject.toml)
 pyyaml==6.0.1
     # via dials-data (pyproject.toml)