diff --git a/tutorials/Example_7_PDE_accuracy.ipynb b/tutorials/Example_7_PDE_accuracy.ipynb
index 3b590df..2bde442 100644
--- a/tutorials/Example_7_PDE_accuracy.ipynb
+++ b/tutorials/Example_7_PDE_accuracy.ipynb
@@ -5,7 +5,7 @@
    "id": "5d904dee",
    "metadata": {},
    "source": [
-    "# Example 6: Solving Partial Differential Equation (PDE)"
+    "# Example 7: Solving Partial Differential Equation (PDE)"
    ]
   },
   {