diff --git a/image-processing-with-numpy.ipynb b/image-processing-with-numpy.ipynb
index 7a27f25..102d967 100644
--- a/image-processing-with-numpy.ipynb
+++ b/image-processing-with-numpy.ipynb
@@ -423,9 +423,9 @@
    "source": [
     "from scipy.ndimage import median_filter\n",
     "\n",
-    "def make_guassian_window(n, sigma=1):\n",
+    "def make_gaussian_window(n, sigma=1):\n",
     "    \"\"\"\n",
-    "    Creates a square window of size n by n of weights from a guassian\n",
+    "    Creates a square window of size n by n of weights from a gaussian\n",
     "    of width sigma.\n",
     "    \"\"\"\n",
     "    nn = int((n-1)/2)\n",
@@ -456,12 +456,12 @@
     "    ax.set_title(\"Mean Filter: window size: {}\".format(w));\n",
     "    ax.set_axis_off();\n",
     "    \n",
-    "# guassian filter\n",
+    "# gaussian filter\n",
     "for w, ax in zip(window_sizes, axs[1]):\n",
-    "    window = make_guassian_window(w,sigma=w)\n",
+    "    window = make_gaussian_window(w,sigma=w)\n",
     "    window /= np.sum(window)\n",
     "    ax.imshow(convolve_all_colours(im_small, window));\n",
-    "    ax.set_title(\"Guassian Filter: window size: {}\".format(w));\n",
+    "    ax.set_title(\"Gaussian Filter: window size: {}\".format(w));\n",
     "    ax.set_axis_off();\n",
     "    \n",
     "# median filter\n",