diff --git a/13_convolutional_neural_networks.ipynb b/13_convolutional_neural_networks.ipynb
index 73c5ead..c128908 100644
--- a/13_convolutional_neural_networks.ipynb
+++ b/13_convolutional_neural_networks.ipynb
@@ -501,6 +501,16 @@
     "    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,
@@ -1949,7 +1959,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.5.2"
+   "version": "3.6.1"
   },
   "nav_menu": {},
   "toc": {