diff --git a/PathPlanning/RRTstar/rrt_star.ipynb b/PathPlanning/RRTstar/rrt_star.ipynb
index 0260be05..0a80a533 100644
--- a/PathPlanning/RRTstar/rrt_star.ipynb
+++ b/PathPlanning/RRTstar/rrt_star.ipynb
@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "### Simulation"
+    "#### Simulation"
    ]
   },
   {
diff --git a/docs/modules/rrt_star.rst b/docs/modules/rrt_star.rst
index e76a8ad9..02ec8d7c 100644
--- a/docs/modules/rrt_star.rst
+++ b/docs/modules/rrt_star.rst
@@ -1,6 +1,6 @@
 
 Simulation
-~~~~~~~~~~
+^^^^^^^^^^
 
 .. code-block:: ipython3