diff --git a/images/signature.pdf b/images/signature.pdf
new file mode 100644
index 0000000..1947df8
Binary files /dev/null and b/images/signature.pdf differ
diff --git a/images/signature.png b/images/signature.png
deleted file mode 100644
index e751797..0000000
Binary files a/images/signature.png and /dev/null differ