diff --git a/requirements-dev.txt b/requirements-dev.txt
index 72cda20..94e9ff7 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,6 +2,6 @@
 # dependencies (Python stdlib), which is a deliberate supply-chain decision:
 # the SBOM for the artifact is short, and the dependency audit has almost
 # nothing to audit. requirements-azure.txt exists solely for the Functions host.
-pytest>=8.0
+pytest>=9.1.1
 bandit>=1.7
 pip-audit>=2.7