diff --git a/spz_python/notebooks/Example_Rank4.ipynb b/spz_python/notebooks/Example_Rank4.ipynb
index 9d94e6c..1cb902a 100644
--- a/spz_python/notebooks/Example_Rank4.ipynb
+++ b/spz_python/notebooks/Example_Rank4.ipynb
@@ -7,7 +7,7 @@
    "source": [
     "# Examples for rank 4 array\n",
     "\n",
-    "Pass COO-like data to `SPZ` with one array for the indices of each dimension.\n",
+    "Pass COO-like data to `SPZ` with one array of indices for each dimension.\n",
     "\n",
     "The default is to create CSF sparse data structure where all but the last dimension are doubly compressed."
    ]