diff --git a/.github/workflows/publish_pypi.yml b/.github/workflows/publish_pypi.yml
index e48524f..1970710 100644
--- a/.github/workflows/publish_pypi.yml
+++ b/.github/workflows/publish_pypi.yml
@@ -20,7 +20,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
-          python-version: "3.8"
+          python-version: "3.9"
       - name: Install build dependencies
         run: |
           python -m pip install --upgrade pip
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0ff6ab9..e04e92f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -48,7 +48,8 @@ jobs:
           auto-activate-base: false
       - name: Install dependencies
         run: |
-          $(command -v mamba || command -v conda) install python-graphblas scipy pandas pytest-cov pytest-randomly pytest-mpl
+          $(command -v mamba || command -v conda) install python-suitesparse-graphblas scipy pandas donfig pyyaml numpy python-graphblas \
+            pytest-cov pytest-randomly pytest-mpl
             # matplotlib lxml pygraphviz pydot sympy  # Extra networkx deps we don't need yet
           pip install git+https://github.com/networkx/networkx.git@main --no-deps
           pip install -e . --no-deps
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 474539b..55021f2 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -33,7 +33,7 @@ repos:
       - id: name-tests-test
         args: ["--pytest-test-first"]
   - repo: https://github.com/abravalheri/validate-pyproject
-    rev: v0.14
+    rev: v0.15
     hooks:
       - id: validate-pyproject
         name: Validate pyproject.toml
@@ -58,12 +58,12 @@ repos:
       - id: auto-walrus
         args: [--line-length, "100"]
   - repo: https://github.com/psf/black
-    rev: 23.9.1
+    rev: 23.10.0
     hooks:
       - id: black
       # - id: black-jupyter
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.0.292
+    rev: v0.1.0
     hooks:
       - id: ruff
         args: [--fix-only, --show-fixes]
@@ -89,7 +89,7 @@ repos:
         additional_dependencies: [tomli]
         files: ^(graphblas_algorithms|docs)/
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.0.292
+    rev: v0.1.0
     hooks:
       - id: ruff
   # `pyroma` may help keep our package standards up to date if best practices change.
diff --git a/graphblas_algorithms/algorithms/shortest_paths/weighted.py b/graphblas_algorithms/algorithms/shortest_paths/weighted.py
index 5afa0f4..0c2883c 100644
--- a/graphblas_algorithms/algorithms/shortest_paths/weighted.py
+++ b/graphblas_algorithms/algorithms/shortest_paths/weighted.py
@@ -27,7 +27,7 @@ def _bellman_ford_path_length(G, source, target=None, *, cutoff=None, name):
         is_negative, iso_value = G.get_properties("has_negative_edges+ iso_value")
         if not is_negative:
             if cutoff is not None:
-                cutoff = int(cutoff // iso_value)
+                cutoff = int(cutoff // iso_value.get())
             d = _bfs_level(G, source, target, cutoff=cutoff, dtype=iso_value.dtype)
             if dst_id is not None:
                 d = d.get(dst_id)
diff --git a/pyproject.toml b/pyproject.toml
index 78b07ef..6ed6386 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,6 +46,7 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3 :: Only",
     "Intended Audience :: Developers",
     "Intended Audience :: Other Audience",
@@ -80,7 +81,7 @@ changelog = "https://github.com/python-graphblas/graphblas-algorithms/releases"
 test = [
     "pytest",
     "networkx >=3.0",
-    "scipy >=1.8",
+    "scipy >=1.9",
     "setuptools",
     "tomli",
 ]
@@ -133,7 +134,7 @@ dirty_template = "{tag}+{ccount}.g{sha}.dirty"
 
 [tool.black]
 line-length = 100
-target-version = ["py39", "py310", "py311"]
+target-version = ["py39", "py310", "py311", "py312"]
 
 [tool.isort]
 sections = ["FUTURE", "STDLIB", "THIRDPARTY", "FIRSTPARTY", "LOCALFOLDER"]