diff --git a/Notebooks/Chap12/12_1_Self_Attention.ipynb b/Notebooks/Chap12/12_1_Self_Attention.ipynb
index d1e9fe5..3a26f94 100644
--- a/Notebooks/Chap12/12_1_Self_Attention.ipynb
+++ b/Notebooks/Chap12/12_1_Self_Attention.ipynb
@@ -153,7 +153,7 @@
     {
       "cell_type": "markdown",
       "source": [
-        "We'll need a softmax function (equation 12.5) -- here, it will take a list of arbirtrary numbers and return a list where the elements are non-negative and sum to one\n"
+        "We'll need a softmax function (equation 12.5) -- here, it will take a list of arbitrary numbers and return a list where the elements are non-negative and sum to one\n"
       ],
       "metadata": {
         "id": "Se7DK6PGPSUk"
@@ -364,7 +364,7 @@
     {
       "cell_type": "markdown",
       "source": [
-        "TODO -- Investigate whether the self-attention mechanism is covariant with respect to permulation.\n",
+        "TODO -- Investigate whether the self-attention mechanism is covariant with respect to permutation.\n",
         "If it is, when we permute the columns of the input matrix $\\mathbf{X}$, the columns of the output matrix $\\mathbf{X}'$ will also be permuted.\n"
       ],
       "metadata": {