diff --git a/Doxyfile.cmake b/Doxyfile.cmake
index 6da30bb5..38ec6d19 100644
--- a/Doxyfile.cmake
+++ b/Doxyfile.cmake
@@ -196,7 +196,7 @@ INCLUDE_GRAPH          = YES
 INCLUDED_BY_GRAPH      = YES
 CALL_GRAPH             = NO
 GRAPHICAL_HIERARCHY    = YES
-DOT_IMAGE_FORMAT       = png
+DOT_IMAGE_FORMAT       = svg
 DOT_PATH               = 
 DOTFILE_DIRS           = 
 MAX_DOT_GRAPH_WIDTH    = 1024