diff --git a/projects/tetrapod/index.md b/projects/tetrapod/index.md
index 881ad48f392a3b9f02f779769c2b4647e402e319..fa685960c1bea031fd4abba5865161e0e9194046 100644
--- a/projects/tetrapod/index.md
+++ b/projects/tetrapod/index.md
@@ -41,6 +41,6 @@ that are joined by a fifth, which binds them together:
 
 All in all we propose that these five aspects can be arranged in a tetrapodal structure
 
-<img alt="the tetrapod image for the five aspects of doing mathematics" src="tetrapod-arms.pdf"/>
+<img alt="the tetrapod image for the five aspects of doing mathematics" src="tetrapod-arms.svg"/>
 
 Feel free to include this image into your paper via the [tikz sources provided here](tetrapod-arms.tex)
diff --git a/projects/tetrapod/tetrapod-arms.pdf b/projects/tetrapod/tetrapod-arms.pdf
deleted file mode 100644
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