diff --git a/doxyfile.in b/doxyfile.in
index 2335adab..470aad35 100644
--- a/doxyfile.in
+++ b/doxyfile.in
@@ -1,4 +1,4 @@
- # Doxyfile 1.6.2
+# Doxyfile 1.9.6
 
 # This file describes the settings to be used by the documentation system
 # doxygen (www.doxygen.org) for a project