diff --git a/onionshare_gui/settings_dialog.py b/onionshare_gui/settings_dialog.py
index 79a35101..64e47dd4 100644
--- a/onionshare_gui/settings_dialog.py
+++ b/onionshare_gui/settings_dialog.py
@@ -18,7 +18,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 """
 from PyQt5 import QtCore, QtWidgets, QtGui
-import sys, platform, datetime
+import os, sys, platform, datetime, webbrowser
 
 from onionshare import strings, common
 from onionshare.settings import Settings
@@ -213,10 +213,13 @@ class SettingsDialog(QtWidgets.QDialog):
         self.save_button.clicked.connect(self.save_clicked)
         self.cancel_button = QtWidgets.QPushButton(strings._('gui_settings_button_cancel', True))
         self.cancel_button.clicked.connect(self.cancel_clicked)
+        self.help_button = QtWidgets.QPushButton(strings._('gui_settings_button_help', True))
+        self.help_button.clicked.connect(self.help_clicked)
         buttons_layout = QtWidgets.QHBoxLayout()
         buttons_layout.addStretch()
         buttons_layout.addWidget(self.save_button)
         buttons_layout.addWidget(self.cancel_button)
+        buttons_layout.addWidget(self.help_button)
 
         # Tor network connection status
         self.tor_status = QtWidgets.QLabel()
@@ -490,6 +493,20 @@ class SettingsDialog(QtWidgets.QDialog):
         common.log('SettingsDialog', 'cancel_clicked')
         self.close()
 
+    def help_clicked(self):
+        """
+        Help button clicked.
+        """
+        common.log('SettingsDialog', 'help_clicked')
+        help_site = 'https://github.com/micahflee/onionshare/wiki'
+        system = platform.system()
+        if system == 'Darwin':
+            # Work around bug in webbrowser on OS X
+            # see http://bugs.python.org/issue30392
+            os.system('open {}'.format(help_site))
+        else:
+            webbrowser.open(help_site)
+
     def settings_from_fields(self):
         """
         Return a Settings object that's full of values from the settings dialog.
diff --git a/share/locale/en.json b/share/locale/en.json
index 701b067c..c1c14263 100644
--- a/share/locale/en.json
+++ b/share/locale/en.json
@@ -81,6 +81,7 @@
     "gui_settings_cookie_label": "Cookie path",
     "gui_settings_button_save": "Save",
     "gui_settings_button_cancel": "Cancel",
+    "gui_settings_button_help": "Help",
     "settings_saved": "Settings saved to {}",
     "settings_error_unknown": "Can't connect to Tor controller because the settings don't make sense.",
     "settings_error_automatic": "Can't connect to Tor controller. Is Tor Browser running in the background? If you don't have it you can get it from:\nhttps://www.torproject.org/.",