diff --git a/pixi.toml b/pixi.toml
index 3851dc97..73f34470 100644
--- a/pixi.toml
+++ b/pixi.toml
@@ -121,7 +121,7 @@ pytest = ">=9.1.1"
 validate-pyproject = ">=0.25"
 pyrefly = ">=1.3.2"
 zizmor = ">=1.30.1"
-tombi = ">=1.8.2"
+tombi = ">=1.8.4"
 # NOTE: don't add cupy, jax, pytorch, or sparse here,
 # as they slow down mypy and are not portable across target OSs