diff --git a/docs/Doxygen.conf b/docs/Doxygen.conf
index 3dff19a06c..071b3ae9e0 100644
--- a/docs/Doxygen.conf
+++ b/docs/Doxygen.conf
@@ -248,7 +248,7 @@ INCLUDED_BY_GRAPH      = YES
 CALL_GRAPH             = NO
 GRAPHICAL_HIERARCHY    = YES
 DIRECTORY_GRAPH        = YES
-DOT_IMAGE_FORMAT       = png
+DOT_IMAGE_FORMAT       = jpg
 DOT_PATH               = 
 DOTFILE_DIRS           = 
 MAX_DOT_GRAPH_WIDTH    = 1024