diff --git a/docs/Doxyfile b/docs/Doxyfile
index 23cd1db..8dfa2a4 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -2491,7 +2491,7 @@ DIRECTORY_GRAPH        = YES
 # The default value is: png.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-DOT_IMAGE_FORMAT       = png
+DOT_IMAGE_FORMAT       = svg
 
 # If DOT_IMAGE_FORMAT is set to svg, then this option can be set to YES to
 # enable generation of interactive SVG images that allow zooming and panning.