diff --git a/figures/pdfs/fig4/figure4.pdf b/figures/pdfs/fig4/figure4.pdf
index 3f3bea55d9..7d043810fd 100644
Binary files a/figures/pdfs/fig4/figure4.pdf and b/figures/pdfs/fig4/figure4.pdf differ
diff --git a/figures/pngs/figure4.png b/figures/pngs/figure4.png
index e2b31192f5..31aa6fae70 100644
Binary files a/figures/pngs/figure4.png and b/figures/pngs/figure4.png differ