diff --git a/setup.cfg b/setup.cfg
index 38448a5b..665d5493 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -33,7 +33,7 @@ install_requires =
     vega >= 3.5,<4.2
     websockets >= 14.0,<16
     xarray >=0.19,<2025.5
-    urllib3 >= 2.1, < 2.5
+    urllib3 >= 2.1, < 2.6
     pydantic >= 2.10.6, < 2.12
     skl2onnx >=1.17,<2 ; python_version<"3.13"
     skl2onnx @ git+https://github.com/onnx/sklearn-onnx@1035fdf ; python_version>="3.13" # TODO: remove when skl2onnx 1.19 is released