diff --git a/docs/notebooks/WindTurbines.ipynb b/docs/notebooks/WindTurbines.ipynb
index 71981b2e57f18b34eb541dabcf815a43f08ad8c4..37fe98c0d6ebb18e2c247eb7c0d533b1c0746416 100644
--- a/docs/notebooks/WindTurbines.ipynb
+++ b/docs/notebooks/WindTurbines.ipynb
@@ -168,7 +168,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### Power curve"
+    "### Power curve"
    ]
   },
   {
@@ -212,7 +212,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "#### CT curve"
+    "### CT curve"
    ]
   },
   {