diff --git a/13_convolutional_neural_networks.ipynb b/13_convolutional_neural_networks.ipynb
index ac7b53f..539de01 100644
--- a/13_convolutional_neural_networks.ipynb
+++ b/13_convolutional_neural_networks.ipynb
@@ -500,6 +500,16 @@
     "    saver = tf.train.Saver()"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "collapsed": true
+   },
+   "source": [
+    "If you are using Python 3.6 on OSX, you need to run the following command on terminal to install the certifi package of certificates because Python 3.6 on OSX has no certificates to validate SSL connections. (https://stackoverflow.com/questions/27835619/urllib-and-ssl-certificate-verify-failed-error)   \n",
+    "/Applications/Python\\ 3.6/Install\\ Certificates.command"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 22,
@@ -1948,7 +1958,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.2"
+   "version": "3.6.1"
   },
   "nav_menu": {},
   "toc": {