diff --git a/docs/conf.py b/docs/conf.py
index 784c40223..dc40f2a0c 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -208,7 +208,7 @@
 
 # The name of an image file (relative to this directory) to place at the top of
 # the title page.
-latex_logo = '_static/logo.png'
+latex_logo = '_static/logo.pdf'
 
 # For "manual" documents, if this is true, then toplevel headings are parts,
 # not chapters.