diff --git a/edvart/report.py b/edvart/report.py
index 59676a6..fead723 100755
--- a/edvart/report.py
+++ b/edvart/report.py
@@ -18,7 +18,7 @@
 from edvart.report_sections.dataset_overview import Overview
 from edvart.report_sections.group_analysis import GroupAnalysis
 from edvart.report_sections.multivariate_analysis import MultivariateAnalysis
-from edvart.report_sections.section_base import Verbosity
+from edvart.report_sections.section_base import Section, Verbosity
 from edvart.report_sections.table_of_contents import TableOfContents
 from edvart.report_sections.timeseries_analysis import TimeseriesAnalysis
 from edvart.report_sections.univariate_analysis import UnivariateAnalysis
@@ -44,7 +44,7 @@ def __init__(
     ):
         self._class_logger = logging.getLogger(__name__).getChild(self.__class__.__name__)
         self.df = dataframe
-        self.sections = []
+        self.sections: list[Section] = []
         self.verbosity = Verbosity(verbosity)
 
     def show(self) -> None: