diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 1aaeb9a7..0191b521 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -6,7 +6,7 @@ repos:
       - id: check-useless-excludes
         # - id: identity  # Prints all files passed to pre-commits. Debugging.
   - repo: https://github.com/lyz-code/yamlfix
-    rev: 1.12.0
+    rev: 1.13.0
     hooks:
       - id: yamlfix
   - repo: https://github.com/pre-commit/pre-commit-hooks
@@ -54,7 +54,7 @@ repos:
     hooks:
       - id: blacken-docs
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.0.278
+    rev: v0.0.282
     hooks:
       - id: ruff
       #   args:
@@ -70,8 +70,14 @@ repos:
     rev: 1.7.0
     hooks:
       - id: nbqa-black
+        additional_dependencies:
+          - black==23.7.0
         exclude: src/lcm/sandbox/
       - id: nbqa-ruff
+        additional_dependencies:
+          - ruff==v0.0.281
+        args:
+          - --ignore=B018,T201
         exclude: src/lcm/sandbox/
   - repo: https://github.com/executablebooks/mdformat
     rev: 0.7.16
diff --git a/src/lcm/simulate.py b/src/lcm/simulate.py
index aff803ee..3fb1ec95 100644
--- a/src/lcm/simulate.py
+++ b/src/lcm/simulate.py
@@ -274,7 +274,7 @@ def create_data_scs(
 
     has_sparse_choice_vars = len(vi.query("is_sparse & is_choice")) > 0
 
-    n_states = len(list(states.values())[0])
+    n_states = len(next(iter(states.values())))
 
     # check that all states have an initial value
     # ==================================================================================