diff --git a/appB.jl b/appB.jl
index b7c3ecc..2863824 100644
--- a/appB.jl
+++ b/appB.jl
@@ -206,7 +206,7 @@ scatter(log1p.(agg_df.deg_ml),
         log1p.(agg_df.deg_web);
         zcolor=agg_df.web_mean,
         xlabel="degree ml", ylabel="degree web",
-        markersize=2, markerstrokewidth=0, markeralpha=0.8,
+        markersize=2, markerstrokewidth=0.5, markeralpha=0.8,
         legend=:topleft, labels = "fraction web",
         xticks=gen_ticks(maximum(classes_df.deg_ml)),
         yticks=gen_ticks(maximum(classes_df.deg_web)))
diff --git a/ch12.jl b/ch12.jl
index 98878f4..45c5cc0 100644
--- a/ch12.jl
+++ b/ch12.jl
@@ -259,7 +259,7 @@ scatter(log1pjitter.(agg_df.deg_ml),
         log1pjitter.(agg_df.deg_web);
         zcolor=agg_df.web_mean,
         xlabel="degree ml", ylabel="degree web",
-        markersize=2, markerstrokewidth=0, markeralpha=0.8,
+        markersize=2, markerstrokewidth=0.5, markeralpha=0.8,
         legend=:topleft, labels="fraction web",
         xticks=gen_ticks(maximum(classes_df.deg_ml)),
         yticks=gen_ticks(maximum(classes_df.deg_web)))