diff --git a/src/napari_ome_zarr_navigator/img_browser.py b/src/napari_ome_zarr_navigator/img_browser.py
index 03dae4b..2487bdb 100644
--- a/src/napari_ome_zarr_navigator/img_browser.py
+++ b/src/napari_ome_zarr_navigator/img_browser.py
@@ -43,6 +43,7 @@ def __init__(self, viewer: "napari.viewer.Viewer"):
         self.btn_load_roi = PushButton(text="Load ROI", enabled=False)
         self.roi_loader = None
         self.roi_widget = None
+        self.filter_widget = None
 
         super().__init__(
             widgets=[
@@ -89,6 +90,12 @@ def initialize_filters(self):
                     ],
                     layout="vertical",
                 )
+                if self.filter_widget:
+                    with suppress(RuntimeError):
+                        self.viewer.window.remove_dock_widget(
+                            self.filter_widget
+                        )
+
                 self.filter_widget = self.viewer.window.add_dock_widget(
                     widget=self.filters,
                     name="Filters",
diff --git a/src/napari_ome_zarr_navigator/roi_loader.py b/src/napari_ome_zarr_navigator/roi_loader.py
index e4c9999..0c585f2 100644
--- a/src/napari_ome_zarr_navigator/roi_loader.py
+++ b/src/napari_ome_zarr_navigator/roi_loader.py
@@ -317,7 +317,7 @@ def find_matching_label_layer(self, table_name):
         try:
             target_label_name = table_attrs["region"]["path"].split("/")[-1]
         except KeyError:
-            target_label_name = list(self.label_layers.keys)[0]
+            target_label_name = list(self.label_layers.keys())[0]
             logger.info(
                 f"Table {table_name} did not have region metadata to match"
                 "it to the correct label image. Attaching the features to the"
@@ -325,7 +325,7 @@ def find_matching_label_layer(self, table_name):
             )
 
         if target_label_name not in self.label_layers:
-            target_label_name = list(self.label_layers.keys)[0]
+            target_label_name = list(self.label_layers.keys())[0]
             logger.info(
                 f"The label {target_label_name} that {table_name} would be "
                 "matched to where not loaded. Attaching the features to the"