diff --git a/Notebooks/Chap03/3_4_Activation_Functions.ipynb b/Notebooks/Chap03/3_4_Activation_Functions.ipynb
index b08449a..e1bb1bf 100644
--- a/Notebooks/Chap03/3_4_Activation_Functions.ipynb
+++ b/Notebooks/Chap03/3_4_Activation_Functions.ipynb
@@ -4,7 +4,7 @@
   "metadata": {
     "colab": {
       "provenance": [],
-      "authorship_tag": "ABX9TyPmra+JD+dm2M3gCqx3bMak",
+      "authorship_tag": "ABX9TyOmxhh3ymYWX+1HdZ91I6zU",
       "include_colab_link": true
     },
     "kernelspec": {
@@ -223,7 +223,7 @@
         "ax.plot(z,sig_z,'r-')\n",
         "ax.set_xlim([-1,1]);ax.set_ylim([0,1])\n",
         "ax.set_xlabel('z'); ax.set_ylabel('sig[z]')\n",
-        "plt.show"
+        "plt.show()"
       ],
       "metadata": {
         "id": "94HIXKJH97ve"
@@ -318,7 +318,7 @@
         "ax.plot(z,heav_z,'r-')\n",
         "ax.set_xlim([-1,1]);ax.set_ylim([-2,2])\n",
         "ax.set_xlabel('z'); ax.set_ylabel('heaviside[z]')\n",
-        "plt.show"
+        "plt.show()"
       ],
       "metadata": {
         "id": "mSPyp7iA-44H"