diff --git a/13_convolutions.ipynb b/13_convolutions.ipynb
index bf5d08f0a..a3b682ab5 100644
--- a/13_convolutions.ipynb
+++ b/13_convolutions.ipynb
@@ -3285,6 +3285,7 @@
     }
    ],
    "source": [
+    "matplotlib.rcParams['image.cmap']='viridis' "
     "learn.activation_stats.color_dim(-2)"
    ]
   },