diff --git a/glue_jupyter/bqplot/scatter/layer_artist.py b/glue_jupyter/bqplot/scatter/layer_artist.py
old mode 100755
new mode 100644
index b0f96de1..9d997658
--- a/glue_jupyter/bqplot/scatter/layer_artist.py
+++ b/glue_jupyter/bqplot/scatter/layer_artist.py
@@ -64,8 +64,8 @@
 
 # Kept for backward compatibility with <= 0.17
 class BqplotScatterLayerState(ScatterLayerState):
-    warnings.warn("`BqplotScatterLayerState` is deprecated and will be removed "
-                  " in a future version. Use `ScatterLayerState` instead")
+    warnings.warn("`BqplotScatterLayerState` is deprecated and will be removed in a "
+                  "future version. Use `ScatterLayerState` instead", DeprecationWarning)
 
 
 class BqplotScatterLayerArtist(LayerArtist):