diff --git a/Notebooks/Chap09/9_1_L2_Regularization.ipynb b/Notebooks/Chap09/9_1_L2_Regularization.ipynb
index bda5af3..4830640 100644
--- a/Notebooks/Chap09/9_1_L2_Regularization.ipynb
+++ b/Notebooks/Chap09/9_1_L2_Regularization.ipynb
@@ -120,7 +120,7 @@
     {
       "cell_type": "code",
       "source": [
-        "# Initialize the parmaeters and draw the model\n",
+        "# Initialize the parameters and draw the model\n",
         "phi = np.zeros((2,1))\n",
         "phi[0] =  -5     # Horizontal offset\n",
         "phi[1] =  25     # Frequency\n",