diff --git a/tools_numpy.ipynb b/tools_numpy.ipynb
index fc73501..ddd3ab6 100644
--- a/tools_numpy.ipynb
+++ b/tools_numpy.ipynb
@@ -230,7 +230,7 @@
    "metadata": {},
    "source": [
     "## `np.arange`\n",
-    "You can create an `ndarray` using NumPy's `range` function, which is similar to python's built-in `range` function:"
+    "You can create an `ndarray` using NumPy's `arange` function, which is similar to python's built-in `range` function:"
    ]
   },
   {