diff --git a/sourcing/templates/navbar-pale-fire.html b/sourcing/templates/navbar-pale-fire.html
index 743ae94..715a618 100644
--- a/sourcing/templates/navbar-pale-fire.html
+++ b/sourcing/templates/navbar-pale-fire.html
@@ -22,9 +22,11 @@
           <a class="nav-link" href="{{ url_for('.logout') }}">logout</a>
         </li>
         {% else %}
-        <li class="nav-item">
-          <a class="nav-link" href="{{ url_for('.signup') }}">signup</a>
-        </li>
+          {% if config.ALLOW_SIGNUP %}
+            <li class="nav-item">
+              <a class="nav-link" href="{{ url_for('.signup') }}">signup</a>
+            </li>
+          {% endif %}
         <li class="nav-item">
           <a class="nav-link" href="{{ url_for('.login') }}">login</a>
         </li>
diff --git a/sourcing/templates/navbar.html b/sourcing/templates/navbar.html
index 2493dbf..34fe230 100644
--- a/sourcing/templates/navbar.html
+++ b/sourcing/templates/navbar.html
@@ -27,9 +27,11 @@
           <a class="nav-link" href="{{ url_for('.logout') }}">logout</a>
         </li>
         {% else %}
-        <li class="nav-item">
-          <a class="nav-link" href="{{ url_for('.signup') }}">signup</a>
-        </li>
+          {% if config.ALLOW_SIGNUP %}
+            <li class="nav-item">
+              <a class="nav-link" href="{{ url_for('.signup') }}">signup</a>
+            </li>
+          {% endif %}
         <li class="nav-item">
           <a class="nav-link" href="{{ url_for('.login') }}">login</a>
         </li>
diff --git a/sourcing/view.py b/sourcing/view.py
index 8bf949f..d023bfc 100644
--- a/sourcing/view.py
+++ b/sourcing/view.py
@@ -177,6 +177,8 @@ def logout():
 
 @bp.route('/signup', methods=['GET', 'POST'])
 def signup():
+    if not current_app.config.get('ALLOW_SIGNUP'):
+        abort(404)
     form = SignupForm()
     if not form.validate_on_submit():
         return render_template('signup.html', form=form)