diff --git a/doc/source/changelog/859.dependencies.md b/doc/source/changelog/859.dependencies.md
new file mode 100644
index 0000000000..0fbb785560
--- /dev/null
+++ b/doc/source/changelog/859.dependencies.md
@@ -0,0 +1 @@
+Bump ansys-sphinx-theme from 1.6.1 to 1.6.3 in the doc group
diff --git a/pyproject.toml b/pyproject.toml
index 0e48f05389..87e0583757 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -98,7 +98,7 @@ tests = [
     "pytest-mpl==0.17.0",
 ]
 doc = [
-    "ansys-sphinx-theme==1.6.1",
+    "ansys-sphinx-theme==1.6.3",
     "build==1.3.0",
     "jupyterlab==4.4.9",
     "jupytext==1.17.3",