diff --git a/constraints.txt b/constraints.txt
index 9a2a1563..9e4ace27 100644
--- a/constraints.txt
+++ b/constraints.txt
@@ -34,7 +34,7 @@ nh3==0.3.0
 packaging==25.0
 pluggy==1.6.0
 Pygments==2.19.2
-pycparser==2.22
+pycparser==2.23
 pydantic==2.11.9
 pydantic-core==2.33.2
 pytest==8.4.2