diff --git a/youtube_dl_gui/downloadmanager.py b/youtube_dl_gui/downloadmanager.py
index 65549c6..4a38fc5 100644
--- a/youtube_dl_gui/downloadmanager.py
+++ b/youtube_dl_gui/downloadmanager.py
@@ -5,6 +5,13 @@
 This module is responsible for managing the download process
 and update the GUI interface.
 
+Attributes:
+    MANAGER_PUB_TOPIC (string): wxPublisher subscription topic of the
+        DownloadManager thread.
+    
+    WORKER_PUB_TOPIC (string): wxPublisher subscription topic of the
+        Worker thread.
+
 Note:
     It's not the actual module that downloads the urls
     thats the job of the 'downloaders' module.
@@ -26,12 +33,15 @@ from .downloaders import YoutubeDLDownloader
 from .utils import YOUTUBEDL_BIN
 
 
+MANAGER_PUB_TOPIC = 'dlmanager'
+WORKER_PUB_TOPIC = 'dlworker'
+
+
 class DownloadManager(Thread):
 
     """Manages the download process.
 
     Attributes:
-        PUBLISHER_TOPIC (string): Subscription topic for the wxPublisher.
         WORKERS_NUMBER (int): Size of custom thread pool.
         WAIT_TIME (float): Time in seconds to sleep.
 
@@ -48,7 +58,6 @@ class DownloadManager(Thread):
 
     """
 
-    PUBLISHER_TOPIC = 'dlmanager'
     WORKERS_NUMBER = 3
     WAIT_TIME = 0.1
 
@@ -162,7 +171,7 @@ class DownloadManager(Thread):
                 3) finished: The download process was completed normally.
 
         """
-        CallAfter(Publisher.sendMessage, self.PUBLISHER_TOPIC, data)
+        CallAfter(Publisher.sendMessage, MANAGER_PUB_TOPIC, data)
 
     def _check_youtubedl(self):
         """Check if youtube-dl binary exists. If not try to download it. """
@@ -200,7 +209,6 @@ class Worker(Thread):
     from the 'downloaders' module.
 
     Attributes:
-        PUBLISHER_TOPIC (string): Subscription topic for the wxPublisher.
         WAIT_TIME (float): Time in seconds to sleep.
 
     Args:
@@ -217,7 +225,6 @@ class Worker(Thread):
 
     """
 
-    PUBLISHER_TOPIC = 'dlworker'
     WAIT_TIME = 0.1
 
     def __init__(self, opt_manager, youtubedl, increase_succ, log_manager=None):
@@ -299,7 +306,7 @@ class Worker(Thread):
     def _talk_to_gui(self, data):
         """Send data back to the GUI after inserting the index. """
         data['index'] = self._index
-        CallAfter(Publisher.sendMessage, self.PUBLISHER_TOPIC, data)
+        CallAfter(Publisher.sendMessage, WORKER_PUB_TOPIC, data)
 
 
 if __name__ == '__main__':
diff --git a/youtube_dl_gui/mainframe.py b/youtube_dl_gui/mainframe.py
index 60fe0fb..7e4f3c0 100644
--- a/youtube_dl_gui/mainframe.py
+++ b/youtube_dl_gui/mainframe.py
@@ -9,8 +9,15 @@ from wx.lib.pubsub import pub as Publisher
 from wx.lib.mixins.listctrl import ListCtrlAutoWidthMixin
 
 from .optionsframe import OptionsFrame
-from .updatemanager import UpdateThread
-from .downloadmanager import DownloadManager
+from .updatemanager import (
+    UPDATE_PUB_TOPIC,
+    UpdateThread
+)
+from .downloadmanager import (
+    MANAGER_PUB_TOPIC,
+    WORKER_PUB_TOPIC,
+    DownloadManager
+)
 
 from .utils import (
     get_icon_file,
@@ -141,9 +148,9 @@ class MainFrame(wx.Frame):
         self._set_sizers()
 
         # Set threads wxCallAfter handlers using subscribe
-        self._set_publisher(self._update_handler, 'update')
-        self._set_publisher(self._status_list_handler, 'dlworker')
-        self._set_publisher(self._download_manager_handler, 'dlmanager')
+        self._set_publisher(self._update_handler, UPDATE_PUB_TOPIC)
+        self._set_publisher(self._status_list_handler, WORKER_PUB_TOPIC)
+        self._set_publisher(self._download_manager_handler, MANAGER_PUB_TOPIC)
 
     def _set_publisher(self, handler, topic):
         """Sets a handler for the given topic.
diff --git a/youtube_dl_gui/updatemanager.py b/youtube_dl_gui/updatemanager.py
index 8eff6ec..225b143 100644
--- a/youtube_dl_gui/updatemanager.py
+++ b/youtube_dl_gui/updatemanager.py
@@ -1,6 +1,12 @@
 #!/usr/bin/env python2
 
-"""Youtubedlg module to update youtube-dl binary. """
+"""Youtubedlg module to update youtube-dl binary.
+
+Attributes:
+    UPDATE_PUB_TOPIC (string): wxPublisher subscription topic of the
+        UpdateThread thread.
+
+"""
 
 import os.path
 from threading import Thread
@@ -15,6 +21,8 @@ from .utils import (
     check_path
 )
 
+UPDATE_PUB_TOPIC = 'update'
+
 
 class UpdateThread(Thread):
 
@@ -22,7 +30,6 @@ class UpdateThread(Thread):
 
     Attributes:
         LATEST_YOUTUBE_DL (string): URL with the latest youtube-dl binary.
-        PUBLISHER_TOPIC (string): Subscription topic for the wx Publisher.
         DOWNLOAD_TIMEOUT (int): Download timeout in seconds.
 
     Args:
@@ -36,7 +43,6 @@ class UpdateThread(Thread):
     """
 
     LATEST_YOUTUBE_DL = 'https://yt-dl.org/latest/'
-    PUBLISHER_TOPIC = 'update'
     DOWNLOAD_TIMEOUT = 20
 
     def __init__(self, download_path, quiet=False):
@@ -84,4 +90,4 @@ class UpdateThread(Thread):
                 4) finish: The update thread is ready to join
 
         """
-        CallAfter(Publisher.sendMessage, self.PUBLISHER_TOPIC, (signal, data))
+        CallAfter(Publisher.sendMessage, UPDATE_PUB_TOPIC, (signal, data))