diff --git a/README.md b/README.md
index c98d00e..b1426dd 100644
--- a/README.md
+++ b/README.md
@@ -168,6 +168,7 @@ The `initProgressBar` function takes an optional object of options. The followin
 | onDataError | function to call on a response that's not JSON or has invalid schema due to a programming error | onError |
 | onResult | function to call when returned non empty result | CeleryProgressBar.onResultDefault |
 | barColors | dictionary containing color values for various progress bar states. Colors that are not specified will defer to defaults | barColorsDefault |
+| defaultMessages | dictionary containing default messages that can be overridden | see below |
 
 The `barColors` option allows you to customize the color of each progress bar state by passing a dictionary of key-value pairs of `state: #hexcode`. The defaults are shown below.
 
@@ -178,6 +179,13 @@ The `barColors` option allows you to customize the color of each progress bar st
 | progress | #68a9ef | ![#68a9ef](https://placehold.it/15/68a9ef/000000?text=+) |
 | ignored | #7a7a7a | ![#7a7a7a](https://placehold.it/15/7a7a7a/000000?text=+) |
 
+The `defaultMessages` option allows you to override some default messages in the UI. At the moment these are:
+
+| Message Id | When Shown | Default Value |
+|-------|----------|:-------------:|
+| waiting | Task is waiting to start | 'Waiting for task to start...'
+| started | Task has started but reports no progress | 'Task started...'
+
 # WebSocket Support
 
 Additionally, this library offers WebSocket support using [Django Channels](https://channels.readthedocs.io/en/latest/)
diff --git a/celery_progress/backend.py b/celery_progress/backend.py
index baba989..bf3cbd1 100644
--- a/celery_progress/backend.py
+++ b/celery_progress/backend.py
@@ -1,10 +1,12 @@
 import datetime
+import logging
 from abc import ABCMeta, abstractmethod
 from decimal import Decimal
 
 from celery.result import EagerResult, allow_join_result
 from celery.backends.base import DisabledBackend
 
+logger = logging.getLogger(__name__)
 
 PROGRESS_STATE = 'PROGRESS'
 
@@ -102,11 +104,12 @@ def get_info(self):
                 'progress': _get_unknown_progress(self.result.state),
             })
         else:
+            logger.error('Task %s has unknown state %s with metadata %s', self.result.id, self.result.state, self.result.info)
             response.update({
                 'complete': True,
                 'success': False,
                 'progress': _get_unknown_progress(self.result.state),
-                'result': 'Unknown state {}'.format(str(self.result.info)),
+                'result': 'Unknown state {}'.format(self.result.state),
             })
         return response
 
diff --git a/celery_progress/static/celery_progress/celery_progress.js b/celery_progress/static/celery_progress/celery_progress.js
index 4fa178c..0a93845 100644
--- a/celery_progress/static/celery_progress/celery_progress.js
+++ b/celery_progress/static/celery_progress/celery_progress.js
@@ -29,12 +29,22 @@ class CeleryProgressBar {
             ignored: '#7a7a7a'
         }
         this.barColors = Object.assign({}, barColorsDefault, options.barColors);
+
+        let defaultMessages = {
+            waiting: 'Waiting for task to start...',
+            started: 'Task started...',
+        }
+        this.messages = Object.assign({}, defaultMessages, options.defaultMessages);
     }
 
     onSuccessDefault(progressBarElement, progressBarMessageElement, result) {
         result = this.getMessageDetails(result);
-        progressBarElement.style.backgroundColor = this.barColors.success;
-        progressBarMessageElement.textContent = "Success! " + result;
+        if (progressBarElement) {
+            progressBarElement.style.backgroundColor = this.barColors.success;
+        }
+        if (progressBarMessageElement) {
+            progressBarMessageElement.textContent = "Success! " + result;
+        }
     }
 
     onResultDefault(resultElement, result) {
@@ -75,9 +85,9 @@ class CeleryProgressBar {
         var description = progress.description || "";
         if (progress.current == 0) {
             if (progress.pending === true) {
-                progressBarMessageElement.textContent = 'Waiting for task to start...';
+                progressBarMessageElement.textContent = this.messages.waiting;
             } else {
-                progressBarMessageElement.textContent = 'Task started...';
+                progressBarMessageElement.textContent = this.messages.started;
             }
         } else {
             progressBarMessageElement.textContent = progress.current + ' of ' + progress.total + ' processed. ' + description;
diff --git a/celery_progress/urls.py b/celery_progress/urls.py
index ff23848..fc3fcc6 100644
--- a/celery_progress/urls.py
+++ b/celery_progress/urls.py
@@ -1,7 +1,7 @@
-from django.conf.urls import url
+from django.urls import re_path
 from . import views
 
 app_name = 'celery_progress'
 urlpatterns = [
-    url(r'^(?P<task_id>[\w-]+)/$', views.get_progress, name='task_status')
+    re_path(r'^(?P<task_id>[\w-]+)/$', views.get_progress, name='task_status')
 ]
diff --git a/setup.py b/setup.py
index 893a1e3..eb0f101 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,7 @@
 
 setup(
     name='celery-progress',
-    version='0.0.14',
+    version='0.1.1',
     packages=find_packages(),
     include_package_data=True,
     license='MIT License',
@@ -34,6 +34,9 @@
         'Programming Language :: Python',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
     ],