diff --git a/kernels/adsorption/pyproject.toml b/kernels/adsorption/pyproject.toml
index 9b3b864..36b491a 100644
--- a/kernels/adsorption/pyproject.toml
+++ b/kernels/adsorption/pyproject.toml
@@ -5,7 +5,7 @@ requires-python = ">=3.11"
 dependencies = [
   "hypothesis>=6.92",
   "kernel-conformance",
-  "pydantic>=2.8",
+  "pydantic>=2.13.2",
   "pytest>=8.0",
 ]