diff --git a/voctocore/lib/sources/decklinkavsource.py b/voctocore/lib/sources/decklinkavsource.py
index 7a1303bc..bfd326a8 100644
--- a/voctocore/lib/sources/decklinkavsource.py
+++ b/voctocore/lib/sources/decklinkavsource.py
@@ -8,6 +8,7 @@
 
 
 class DeckLinkAVSource(AVSource):
+
     def __init__(self, name, outputs=None, has_audio=True, has_video=True):
         self.log = logging.getLogger('DecklinkAVSource[{}]'.format(name))
         super().__init__(name, outputs, has_audio, has_video)
@@ -94,7 +95,7 @@ def _parse_audiostream_map(self, config_section):
 
         for key in Config[config_section]:
             value = Config.get(config_section, key)
-            m = re.match('audiostream\[(\d+)\]', key)
+            m = re.match(r'audiostream\[(\d+)\]', key)
             if m:
                 audiostream = int(m.group(1))
                 audiostream_map[audiostream] = value
@@ -102,7 +103,7 @@ def _parse_audiostream_map(self, config_section):
         return audiostream_map
 
     def _parse_audiostream_mapping(self, mapping):
-        m = re.match('(\d+)\+(\d+)', mapping)
+        m = re.match(r'(\d+)\+(\d+)', mapping)
         if m:
             return (int(m.group(1)), int(m.group(2)),)
         else:
diff --git a/voctocore/tests/helper/voctomix_test.py b/voctocore/tests/helper/voctomix_test.py
index e19a865e..29d97aa8 100644
--- a/voctocore/tests/helper/voctomix_test.py
+++ b/voctocore/tests/helper/voctomix_test.py
@@ -22,7 +22,7 @@ def setUp(self):
         lib.config.Config.resetToDefaults()
 
     def assertContainsIgnoringWhitespace(self, text, search):
-        regex = search.replace(" ", "\s*")
+        regex = search.replace(" ", r"\s*")
 
         try:
             self.assertRegex(text, regex)
diff --git a/voctocore/voctocore.py b/voctocore/voctocore.py
index f80905a6..fe59bb2b 100755
--- a/voctocore/voctocore.py
+++ b/voctocore/voctocore.py
@@ -70,8 +70,8 @@ def main():
     args.parse()
 
     from lib.args import Args
-    docolor = (Args.color == 'always') or (Args.color == 'auto' and
-                                           sys.stderr.isatty())
+    docolor = (Args.color == 'always') \
+        or (Args.color == 'auto' and sys.stderr.isatty())
 
     handler = LogHandler(docolor, Args.timestamp)
     logging.root.addHandler(handler)
diff --git a/voctogui/lib/connection.py b/voctogui/lib/connection.py
index 86830787..caddbe2c 100644
--- a/voctogui/lib/connection.py
+++ b/voctogui/lib/connection.py
@@ -17,7 +17,7 @@ def establish(host):
 
     log.info('establishing Connection to %s', host)
     conn = socket.create_connection((host, port))
-    log.debug('Connection successful \o/')
+    log.debug(r'Connection successful \o/')
 
     ip = conn.getpeername()[0]
     log.debug('Remote-IP is %s', ip)
diff --git a/voctogui/lib/videodisplay.py b/voctogui/lib/videodisplay.py
index 0714f80c..36eba206 100644
--- a/voctogui/lib/videodisplay.py
+++ b/voctogui/lib/videodisplay.py
@@ -21,8 +21,8 @@ def __init__(self, drawing_area, port, width=None, height=None,
         else:
             previewcaps = Config.get('mix', 'videocaps')
 
-        use_previews = (Config.getboolean('previews', 'enabled') and
-                        Config.getboolean('previews', 'use'))
+        use_previews = Config.getboolean('previews', 'enabled') \
+            and Config.getboolean('previews', 'use')
 
         # Preview-Ports are Raw-Ports + 1000
         if use_previews:
diff --git a/voctogui/voctogui.py b/voctogui/voctogui.py
index f20889a8..4f23fbb0 100755
--- a/voctogui/voctogui.py
+++ b/voctogui/voctogui.py
@@ -34,6 +34,7 @@
 
 # main class
 class Voctogui(object):
+
     def __init__(self):
         self.log = logging.getLogger('Voctogui')
         from lib.args import Args
@@ -123,8 +124,8 @@ def main():
     args.parse()
 
     from lib.args import Args
-    docolor = (Args.color == 'always') or (Args.color == 'auto' and
-                                           sys.stderr.isatty())
+    docolor = (Args.color == 'always') \
+        or (Args.color == 'auto' and sys.stderr.isatty())
 
     from lib.loghandler import LogHandler
     handler = LogHandler(docolor, Args.timestamp)
@@ -165,8 +166,8 @@ def main():
     # The list-comparison is not complete
     # (one could use a local hostname or the local system ip),
     # but it's only here to warn that one might be making a mistake
-    use_previews = (Config.getboolean('previews', 'enabled') and
-                    Config.getboolean('previews', 'use'))
+    use_previews = Config.getboolean('previews', 'enabled') \
+        and Config.getboolean('previews', 'use')
     looks_like_localhost = Config.get('server', 'host') in ['::1',
                                                             '127.0.0.1',
                                                             'localhost']