diff --git a/rqt_bag/src/rqt_bag/timeline_frame.py b/rqt_bag/src/rqt_bag/timeline_frame.py
index 60ce2c7e..9d38b2e2 100644
--- a/rqt_bag/src/rqt_bag/timeline_frame.py
+++ b/rqt_bag/src/rqt_bag/timeline_frame.py
@@ -1087,7 +1087,11 @@ def on_mouse_up(self, event):
         self.scene().update()
 
     def on_mousewheel(self, event):
-        dz = event.delta() / 120.0
+        try:
+            delta = event.angleDelta().y()
+        except AttributeError:
+            delta = event.delta()
+        dz = delta / 120.0
         self.zoom_timeline(1.0 - dz * 0.2)
 
     def on_mouse_move(self, event):
diff --git a/rqt_graph/src/rqt_graph/interactive_graphics_view.py b/rqt_graph/src/rqt_graph/interactive_graphics_view.py
index 40a15a05..60f97c90 100644
--- a/rqt_graph/src/rqt_graph/interactive_graphics_view.py
+++ b/rqt_graph/src/rqt_graph/interactive_graphics_view.py
@@ -64,7 +64,10 @@ def mouseMoveEvent(self, mouse_event):
 
     def wheelEvent(self, wheel_event):
         if wheel_event.modifiers() == Qt.NoModifier:
-            delta = wheel_event.delta()
+            try:
+                delta = wheel_event.angleDelta().y()
+            except AttributeError:
+                delta = wheel_event.delta()
             delta = max(min(delta, 480), -480)
             mouse_before_scale_in_scene = self.mapToScene(wheel_event.pos())
 
diff --git a/rqt_plot/src/rqt_plot/data_plot/qwt_data_plot.py b/rqt_plot/src/rqt_plot/data_plot/qwt_data_plot.py
index bdaccd92..54936a30 100644
--- a/rqt_plot/src/rqt_plot/data_plot/qwt_data_plot.py
+++ b/rqt_plot/src/rqt_plot/data_plot/qwt_data_plot.py
@@ -214,7 +214,11 @@ def wheelEvent(self, event):  # mouse wheel zooms the y-axis
         # y position of pointer in graph coordinates
         canvas_y = event.y() - self.canvas().y()
 
-        zoom_factor = max(-0.6, min(0.6, (event.delta() / 120) / 6.0))
+        try:
+            delta = event.angleDelta().y()
+        except AttributeError:
+            delta = event.delta()
+        zoom_factor = max(-0.6, min(0.6, (delta / 120) / 6.0))
         delta_y = (self.canvas().height() / 2.0) - canvas_y
         self.move_canvas(0, zoom_factor * delta_y * 1.0225)