diff --git a/requirements-dev.txt b/requirements-dev.txt
index 93c1bf7..31a6649 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -16,7 +16,7 @@
 mypy>=1.11.0
 # Imported directly by the offline tests, which evaluate requirements.txt's
 # version markers the way an installer does. The floor is pytest's own.
-packaging>=22.0
+packaging>=26.3
 # 9.0.3 rather than 8.x: the 8.3.0 floor is affected by CVE-2025-71176
 # (insecure temporary directory handling). Caught by this repo's own audit gate.
 pytest>=9.0.3