diff --git a/pyproject.toml b/pyproject.toml
index 360f87ac9cf..88656fcfc6f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ tests = [
 doc = [
     "Sphinx==8.1.3",
     "numpydoc==1.10.0",
-    "ansys-sphinx-theme==1.6.3",
+    "ansys-sphinx-theme==1.6.4",
     "sphinx-copybutton==0.5.2",
     "sphinx-gallery==0.20.0",
     "sphinxcontrib-mermaid==1.2.3",