diff --git a/physics/docs/ccpp_doxyfile b/physics/docs/ccpp_doxyfile
index 595ba2d85..08dce3599 100644
--- a/physics/docs/ccpp_doxyfile
+++ b/physics/docs/ccpp_doxyfile
@@ -400,7 +400,6 @@ FORMULA_MACROFILE      =
 USE_MATHJAX            = YES
 MATHJAX_VERSION        = MathJax_2
 MATHJAX_FORMAT         = HTML-CSS
-#MATHJAX_RELPATH        = https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2
 MATHJAX_RELPATH        = https://cdn.jsdelivr.net/npm/mathjax@2
 MATHJAX_EXTENSIONS     =
 MATHJAX_CODEFILE       =
diff --git a/physics/docs/ccppsrw_doxyfile b/physics/docs/ccppsrw_doxyfile
index 09ebccf86..7edc44bad 100644
--- a/physics/docs/ccppsrw_doxyfile
+++ b/physics/docs/ccppsrw_doxyfile
@@ -398,7 +398,6 @@ FORMULA_MACROFILE      =
 USE_MATHJAX            = YES
 MATHJAX_VERSION        = MathJax_2
 MATHJAX_FORMAT         = HTML-CSS
-#MATHJAX_RELPATH        = https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.2
 MATHJAX_RELPATH        = https://cdn.jsdelivr.net/npm/mathjax@2
 MATHJAX_EXTENSIONS     =
 MATHJAX_CODEFILE       =