diff --git a/openpype/tools/loader/widgets.py b/openpype/tools/loader/widgets.py
index c2c6c5dfcd..8d58e82230 100644
--- a/openpype/tools/loader/widgets.py
+++ b/openpype/tools/loader/widgets.py
@@ -264,8 +264,8 @@ class SubsetWidget(QtWidgets.QWidget):
 
         group_checkbox.stateChanged.connect(self.set_grouping)
 
-        subset_filter.textChanged.connect(proxy.setFilterRegExp)
-        subset_filter.textChanged.connect(view.expandAll)
+        subset_filter.textChanged.connect(self._subset_changed)
+
         model.refreshed.connect(self.refreshed)
 
         self.proxy = proxy
@@ -293,6 +293,13 @@ class SubsetWidget(QtWidgets.QWidget):
                                           current_index=False):
             self.model.set_grouping(state)
 
+    def _subset_changed(self, text):
+        if hasattr(self.proxy, "setFilterRegularExpression"):
+            self.proxy.setFilterRegularExpression(text)
+        else:
+            self.proxy.setFilterRegExp(text)
+        self.view.expandAll()
+
     def set_loading_state(self, loading, empty):
         view = self.view
 
diff --git a/openpype/tools/sceneinventory/window.py b/openpype/tools/sceneinventory/window.py
index 7b305e8e8f..8a6e43f796 100644
--- a/openpype/tools/sceneinventory/window.py
+++ b/openpype/tools/sceneinventory/window.py
@@ -160,7 +160,10 @@ class SceneInventoryWindow(QtWidgets.QDialog):
         self._model.set_hierarchy_view(enabled)
 
     def _on_text_filter_change(self, text_filter):
-        self._proxy.setFilterRegExp(text_filter)
+        if hasattr(self._proxy, "setFilterRegularExpression"):
+            self._proxy.setFilterRegularExpression(text_filter)
+        else:
+            self._proxy.setFilterRegExp(text_filter)
 
     def _on_outdated_state_change(self):
         self._proxy.set_filter_outdated(
diff --git a/openpype/tools/settings/settings/search_dialog.py b/openpype/tools/settings/settings/search_dialog.py
index 2860e7c943..71d258febe 100644
--- a/openpype/tools/settings/settings/search_dialog.py
+++ b/openpype/tools/settings/settings/search_dialog.py
@@ -106,7 +106,10 @@ class SearchEntitiesDialog(QtWidgets.QDialog):
 
     def _on_filter_timer(self):
         text = self._filter_edit.text()
-        self._proxy.setFilterRegExp(text)
+        if hasattr(self._proxy, "setFilterRegularExpression"):
+            self._proxy.setFilterRegularExpression(text)
+        else:
+            self._proxy.setFilterRegExp(text)
 
         # WARNING This expanding and resizing is relatively slow.
         self._view.expandAll()