diff --git a/docs/conf.py b/docs/conf.py
index 0fe672d..a7f536b 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -4,6 +4,7 @@
 # https://www.sphinx-doc.org/en/master/usage/configuration.html
 
 import importlib.metadata
+
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
 import os
diff --git a/pySEQTarget/SEQuential.py b/pySEQTarget/SEQuential.py
index b068dc9..d13685f 100644
--- a/pySEQTarget/SEQuential.py
+++ b/pySEQTarget/SEQuential.py
@@ -7,19 +7,36 @@
 import numpy as np
 import polars as pl
 
-from .analysis import (_calculate_hazard, _calculate_survival, _outcome_fit,
-                       _pred_risk, _risk_estimates, _subgroup_fit)
+from .analysis import (
+    _calculate_hazard,
+    _calculate_survival,
+    _outcome_fit,
+    _pred_risk,
+    _risk_estimates,
+    _subgroup_fit,
+)
 from .error import _datachecker, _param_checker
 from .expansion import _binder, _diagnostics, _dynamic, _random_selection
 from .helpers import _col_string, _format_time, bootstrap_loop
-from .initialization import (_cense_denominator, _cense_numerator,
-                             _denominator, _numerator, _outcome)
+from .initialization import (
+    _cense_denominator,
+    _cense_numerator,
+    _denominator,
+    _numerator,
+    _outcome,
+)
 from .plot import _survival_plot
 from .SEQopts import SEQopts
 from .SEQoutput import SEQoutput
-from .weighting import (_fit_denominator, _fit_LTFU, _fit_numerator,
-                        _weight_bind, _weight_predict, _weight_setup,
-                        _weight_stats)
+from .weighting import (
+    _fit_denominator,
+    _fit_LTFU,
+    _fit_numerator,
+    _weight_bind,
+    _weight_predict,
+    _weight_setup,
+    _weight_stats,
+)
 
 
 class SEQuential:
diff --git a/pySEQTarget/analysis/__init__.py b/pySEQTarget/analysis/__init__.py
index 6799dfd..e35ceb7 100644
--- a/pySEQTarget/analysis/__init__.py
+++ b/pySEQTarget/analysis/__init__.py
@@ -3,6 +3,5 @@
 from ._risk_estimates import _risk_estimates as _risk_estimates
 from ._subgroup_fit import _subgroup_fit as _subgroup_fit
 from ._survival_pred import _calculate_survival as _calculate_survival
-from ._survival_pred import \
-    _get_outcome_predictions as _get_outcome_predictions
+from ._survival_pred import _get_outcome_predictions as _get_outcome_predictions
 from ._survival_pred import _pred_risk as _pred_risk
diff --git a/pyproject.toml b/pyproject.toml
index 6c81048..626e370 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "pySEQTarget"
-version = "0.9.0"
+version = "0.9.1"
 description = "Sequentially Nested Target Trial Emulation"
 readme = "README.md"
 license = {text = "MIT"}