diff --git a/developer-doc/Doxyfile b/developer-doc/Doxyfile
index 6a48ae0fcdd50614ffcad857aac82d4c76c49191..82fb5a6010b5307558e9d3a3a2e8e42f84cbb0df 100644
--- a/developer-doc/Doxyfile
+++ b/developer-doc/Doxyfile
@@ -1459,7 +1459,7 @@ MATHJAX_FORMAT         = HTML-CSS
 # The default value is: http://cdn.mathjax.org/mathjax/latest.
 # This tag requires that the tag USE_MATHJAX is set to YES.
 
-MATHJAX_RELPATH        = http://cdn.mathjax.org/mathjax/latest
+MATHJAX_RELPATH        = https://cdn.mathjax.org/mathjax/latest
 
 # The MATHJAX_EXTENSIONS tag can be used to specify one or more MathJax
 # extension names that should be enabled during MathJax rendering. For example