diff --git a/src/bonsai/bonsai/bim/module/bsdd/operator.py b/src/bonsai/bonsai/bim/module/bsdd/operator.py
index 173adb7258..3ccfbe3452 100644
--- a/src/bonsai/bonsai/bim/module/bsdd/operator.py
+++ b/src/bonsai/bonsai/bim/module/bsdd/operator.py
@@ -22,6 +22,7 @@ import bonsai.tool as tool
 import ifcopenshell.api.pset
 import ifcopenshell.util.element
 from bonsai.core import bsdd as core
+from typing import Any
 
 
 class LoadBSDDDictionaries(bpy.types.Operator):
@@ -88,7 +89,7 @@ class AddBSDDProperties(bpy.types.Operator, tool.Ifc.Operator):
         self.file = tool.Ifc.get()
         bprops = tool.Bsdd.get_bsdd_props()
 
-        psets = {}
+        psets: dict[str, dict[str, Any]] = {}
         for selected_property in bprops.selected_properties:
             psets.setdefault(selected_property.metadata, {})[selected_property.name] = selected_property.get_value()
 
diff --git a/src/bonsai/bonsai/bim/module/drawing/operator.py b/src/bonsai/bonsai/bim/module/drawing/operator.py
index 57b1981e2c..d5a9a07097 100644
--- a/src/bonsai/bonsai/bim/module/drawing/operator.py
+++ b/src/bonsai/bonsai/bim/module/drawing/operator.py
@@ -2437,7 +2437,9 @@ class SaveDrawingStyle(bpy.types.Operator, tool.Ifc.Operator):
         style = {}
         eval_namespace = {"context": context, "scene": scene, "space": space}
 
-        def add_prop_to_style(prop_path, context, scene, space):
+        def add_prop_to_style(
+            prop_path: str, context: bpy.types.Context, scene: bpy.types.Scene, space: bpy.types.SpaceView3D
+        ) -> None:
             value = eval(prop_path)
             if not isinstance(value, str):
                 try:
diff --git a/src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py b/src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py
index f863456466..286f9fc990 100644
--- a/src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py
+++ b/src/ifcopenshell-python/ifcopenshell/api/pset/edit_pset.py
@@ -320,7 +320,7 @@ class Usecase:
         return prop
 
     def add_new_properties(self) -> list[ifcopenshell.entity_instance]:
-        properties = []
+        properties: list[ifcopenshell.entity_instance] = []
         for name, value in self.settings["properties"].items():
             if value is None and self.settings["should_purge"]:
                 continue