diff --git a/pyproject.toml b/pyproject.toml
index f07e978..6a1ae5e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ requires-python = ">=3.8"
 
 dependencies = [
   # intentionally loose. perhaps these should be vendored to not collide with user code?
-  "attrs>=20.1,<24",
+  "attrs>=20.1,<26",
   "fastapi>=0.100,<0.116.0",
   "pydantic>=1.9,<3",
   "PyYAML",