diff --git a/README.md b/README.md
index 3da0e4e..d545d4c 100644
--- a/README.md
+++ b/README.md
@@ -108,7 +108,7 @@ ax_lines.get_shared_x_axes().join(ax_lines, ax_fgivenx, ax_samples)
 fig.tight_layout()
 fig.savefig('plot.pdf')
 ```
-![](https://raw.github.com/williamjameshandley/fgivenx/master/plot.pdf)
+![](https://raw.github.com/williamjameshandley/fgivenx/master/plot.png)
 
 
 
diff --git a/plot.pdf b/plot.pdf
deleted file mode 100644
index d925057..0000000
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diff --git a/plot.png b/plot.png
new file mode 100644
index 0000000..4307e7a
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