diff --git a/doc/requirements.txt b/doc/requirements.txt
index 221034a..6a39e2d 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,7 +1,7 @@
-ansys-sphinx-theme==1.3.3
+ansys-sphinx-theme==1.6.3
 Sphinx==8.2.3
 sphinx-copybutton==0.5.2
 sphinx-design==0.6.1
 sphinx-notfound-page==1.1.0
 sphinxemoji==0.3.1
-snowballstemmer<3
+snowballstemmer<4