diff --git a/dd_unit_scaling/pyproject.toml b/dd_unit_scaling/pyproject.toml
index fe461cd..022a498 100644
--- a/dd_unit_scaling/pyproject.toml
+++ b/dd_unit_scaling/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "dd-unit-scaling"
-version = "0.1.0"
+version = "0.1.1"
 description = "Compile-friendly, world-size-aware unit scaling"
 readme = "README.md"
 requires-python = ">=3.12"
@@ -13,11 +13,6 @@ dependencies = [
     "unit-scaling>=0.2.0",
 ]
 
-[project.optional-dependencies]
-optim = [
-    "dion",
-]
-
 [tool.setuptools.packages.find]
 include = ["dd_unit_scaling*"]