diff --git a/doc/changelog.d/815.changed.md b/doc/changelog.d/815.changed.md
new file mode 100644
index 000000000..a3bbe32d9
--- /dev/null
+++ b/doc/changelog.d/815.changed.md
@@ -0,0 +1 @@
+Update ACT API Reference Guide link
\ No newline at end of file
diff --git a/doc/source/links.rst b/doc/source/links.rst
index 7c05eebd8..59b55feab 100644
--- a/doc/source/links.rst
+++ b/doc/source/links.rst
@@ -15,4 +15,4 @@
 .. _Mechanical Users Guide: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/%%VERSION%%/en/wb_sim/ds_Home.html
 .. _Chapter 6: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/%%VERSION%%/en/installation/unix_silent.html
 .. _Chapter 7: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/%%VERSION%%/en/installation/win_silent.html
-.. _ACT API Reference Guide: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/%%VERSION%%/en/act_ref/act_ref.html
\ No newline at end of file
+.. _ACT API Reference Guide: https://developer.ansys.com/docs/mechanical-scripting-interface/api/ansys/mechanical/stubs/%%VERSION%%/index.md