diff --git a/src/bonsai/bonsai/bim/helper.py b/src/bonsai/bonsai/bim/helper.py
index 9363a69f78..a492752f8d 100644
--- a/src/bonsai/bonsai/bim/helper.py
+++ b/src/bonsai/bonsai/bim/helper.py
@@ -32,7 +32,12 @@ from bonsai.bim.ifc import IfcStore
 from typing import Optional, Callable, Any, Union
 
 
-def draw_attributes(props, layout, copy_operator=None, popup_active_attribute=None):
+def draw_attributes(
+    props: list[bpy.types.PropertyGroup],
+    layout: bpy.types.UILayout,
+    copy_operator: Optional[str] = None,
+    popup_active_attribute: Optional[bpy.types.PropertyGroup] = None,
+) -> None:
     """you can set attribute active in popup with `active_attribute`
     meaning you will be able to type into attribute's field without having to click
     on it first
@@ -44,7 +49,9 @@ def draw_attributes(props, layout, copy_operator=None, popup_active_attribute=No
         draw_attribute(attribute, row, copy_operator)
 
 
-def draw_attribute(attribute, layout, copy_operator=None):
+def draw_attribute(
+    attribute: bpy.types.PropertyGroup, layout: bpy.types.UILayout, copy_operator: Optional[str] = None
+) -> None:
     value_name = attribute.get_value_name()
     if not value_name:
         layout.label(text=attribute.name)
diff --git a/src/bonsai/bonsai/bim/module/classification/ui.py b/src/bonsai/bonsai/bim/module/classification/ui.py
index 537aae0dbf..300cfc5b8c 100644
--- a/src/bonsai/bonsai/bim/module/classification/ui.py
+++ b/src/bonsai/bonsai/bim/module/classification/ui.py
@@ -16,6 +16,7 @@
 # You should have received a copy of the GNU General Public License
 # along with Bonsai.  If not, see <http://www.gnu.org/licenses/>.
 
+import bpy
 import bonsai.bim.helper
 import bonsai.tool as tool
 import bonsai.bim.module.classification.prop as classification_prop
@@ -116,6 +117,8 @@ class BIM_PT_classifications(Panel):
 
 
 class ReferenceUI:
+    layout: bpy.types.UILayout
+
     def draw_ui(self, context):
         obj = context.active_object
         self.sprops = context.scene.BIMClassificationProperties
diff --git a/src/bonsai/scripts/get_wheels.py b/src/bonsai/scripts/get_wheels.py
index 8af0c02e82..086dc99775 100644
--- a/src/bonsai/scripts/get_wheels.py
+++ b/src/bonsai/scripts/get_wheels.py
@@ -2,7 +2,7 @@ import os
 import sys
 
 
-def find_whl_files(directory):
+def find_whl_files(directory: str) -> list[str]:
     whl_files = []
     for root, dirs, files in os.walk(directory):
         for file in files:
@@ -12,7 +12,7 @@ def find_whl_files(directory):
     return whl_files
 
 
-def update_pyproject_toml(pyproject_path, whl_files):
+def update_pyproject_toml(pyproject_path: str, whl_files: list[str]) -> None:
     with open(pyproject_path, "a") as f:
         f.write("\nwheels = [\n")
         for whl in whl_files:
diff --git a/src/ifcopenshell-python/ifcopenshell/api/style/remove_style.py b/src/ifcopenshell-python/ifcopenshell/api/style/remove_style.py
index 96640ec8a6..bf10cd57ce 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/style/remove_style.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/style/remove_style.py
@@ -27,9 +27,7 @@ def remove_style(file: ifcopenshell.file, style: ifcopenshell.entity_instance) -
     All of the presentation items of the style will also be removed.
 
     :param style: The IfcPresentationStyle to remove.
-    :type style: ifcopenshell.entity_instance
     :return: None
-    :rtype: None
 
     Example:
 
@@ -51,25 +49,25 @@ class Usecase:
     file: ifcopenshell.file
     settings: dict[str, Any]
 
-    def execute(self):
+    def execute(self) -> None:
         self.purge_styled_items(self.settings["style"])
         for style in self.settings["style"].Styles or []:
             ifcopenshell.api.style.remove_surface_style(self.file, style=style)
         self.file.remove(self.settings["style"])
 
-    def purge_styled_items(self, style):
+    def purge_styled_items(self, style: ifcopenshell.entity_instance) -> None:
         for inverse in self.file.get_inverse(style):
             if inverse.is_a("IfcStyledItem") and len(inverse.Styles) == 1:
                 self.purge_styled_representations(inverse)
                 self.file.remove(inverse)
 
-    def purge_styled_representations(self, styled_item):
+    def purge_styled_representations(self, styled_item: ifcopenshell.entity_instance) -> None:
         for inverse in self.file.get_inverse(styled_item):
             if inverse.is_a("IfcStyledRepresentation") and len(inverse.Items) == 1:
                 self.purge_material_definition_representations(inverse)
                 self.file.remove(inverse)
 
-    def purge_material_definition_representations(self, styled_representation):
+    def purge_material_definition_representations(self, styled_representation: ifcopenshell.entity_instance) -> None:
         for inverse in self.file.get_inverse(styled_representation):
             if inverse.is_a("IfcMaterialDefinitionRepresentation") and len(inverse.Representations) == 1:
                 self.file.remove(inverse)