diff --git a/constraints.txt b/constraints.txt
index 6920c64..b4330af 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -49,7 +49,7 @@ pytest==9.1.1
 
 # --- transitive, pulled in by pytest ---
 iniconfig==2.3.0
-packaging==25.0
+packaging==26.3
 pluggy==1.6.0
 Pygments==2.21.0