diff --git a/core/__init__.py b/core/__init__.py
index b20f3d0b..b5fd8ee8 100644
--- a/core/__init__.py
+++ b/core/__init__.py
@@ -445,8 +445,8 @@ def initialize(section=None):
         pass
     devnull.close()
 
-    COMPRESSEDCONTAINER = [re.compile('.r\d{2}$', re.I),
-                           re.compile('.part\d+.rar$', re.I),
+    COMPRESSEDCONTAINER = [re.compile(r'.r\d{2}$', re.I),
+                           re.compile(r'.part\d+.rar$', re.I),
                            re.compile('.rar$', re.I)]
     COMPRESSEDCONTAINER += [re.compile('{0}$'.format(ext), re.I) for ext in CFG["Extensions"]["compressedExtensions"]]
     MEDIACONTAINER = CFG["Extensions"]["mediaExtensions"]
diff --git a/core/scene_exceptions.py b/core/scene_exceptions.py
index aa85326e..3a315353 100644
--- a/core/scene_exceptions.py
+++ b/core/scene_exceptions.py
@@ -123,7 +123,7 @@ def rename_script(dirname):
     rename_file = ""
     for dir, dirs, files in os.walk(dirname):
         for file in files:
-            if re.search('(rename\S*\.(sh|bat)$)', file, re.IGNORECASE):
+            if re.search(r'(rename\S*\.(sh|bat)$)', file, re.IGNORECASE):
                 rename_file = os.path.join(dir, file)
                 dirname = dir
                 break
diff --git a/core/transcoder.py b/core/transcoder.py
index fc4bb4e0..4314a715 100644
--- a/core/transcoder.py
+++ b/core/transcoder.py
@@ -132,7 +132,7 @@ def build_commands(file, new_dir, movie_name, bitbucket):
         elif check:
             name = ('{0}.cd{1}'.format(movie_name, check.groups()[0]))
         elif core.CONCAT and re.match("(.+)[cC][dD][0-9]", name):
-            name = re.sub("([\ \.\-\_\=\:]+[cC][dD][0-9])", "", name)
+            name = re.sub('([ ._=:-]+[cC][dD][0-9])', "", name)
         if ext == core.VEXTENSION and new_dir == dir:  # we need to change the name to prevent overwriting itself.
             core.VEXTENSION = '-transcoded{ext}'.format(ext=core.VEXTENSION)  # adds '-transcoded.ext'
     else:
@@ -649,8 +649,8 @@ def rip_iso(item, new_dir, bitbucket):
         print_cmd(cmd)
         proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=bitbucket)
         out, err = proc.communicate()
-        file_list = [re.match(".+(VIDEO_TS[\\\/]VTS_[0-9][0-9]_[0-9].[Vv][Oo][Bb])", line).groups()[0] for line in
-                     out.splitlines() if re.match(".+VIDEO_TS[\\\/]VTS_[0-9][0-9]_[0-9].[Vv][Oo][Bb]", line)]
+        file_list = [re.match(r".+(VIDEO_TS[/\\]VTS_[0-9][0-9]_[0-9].[Vv][Oo][Bb])", line).groups()[0] for line in
+                     out.splitlines() if re.match(r".+VIDEO_TS[/\\]VTS_[0-9][0-9]_[0-9].[Vv][Oo][Bb]", line)]
         combined = []
         for n in range(99):
             concat = []
diff --git a/core/utils.py b/core/utils.py
index 9784f5f7..7277c25a 100644
--- a/core/utils.py
+++ b/core/utils.py
@@ -244,7 +244,7 @@ def is_min_size(input_name, min_size):
 
 def is_sample(input_name):
     # Ignore 'sample' in files
-    if re.search('(^|[\W_])sample\d*[\W_]', input_name.lower()):
+    if re.search('(^|[\\W_])sample\\d*[\\W_]', input_name.lower()):
         return True
 
 
@@ -1014,13 +1014,13 @@ def clean_file_name(filename):
     space, but handles decimal numbers in string, for example:
     """
 
-    filename = re.sub("(\D)\.(?!\s)(\D)", "\\1 \\2", filename)
-    filename = re.sub("(\d)\.(\d{4})", "\\1 \\2", filename)  # if it ends in a year then don't keep the dot
-    filename = re.sub("(\D)\.(?!\s)", "\\1 ", filename)
-    filename = re.sub("\.(?!\s)(\D)", " \\1", filename)
+    filename = re.sub(r"(\D)\.(?!\s)(\D)", r"\1 \2", filename)
+    filename = re.sub(r"(\d)\.(\d{4})", r"\1 \2", filename)  # if it ends in a year then don't keep the dot
+    filename = re.sub(r"(\D)\.(?!\s)", r"\1 ", filename)
+    filename = re.sub(r"\.(?!\s)(\D)", r" \1", filename)
     filename = filename.replace("_", " ")
     filename = re.sub("-$", "", filename)
-    filename = re.sub("^\[.*\]", "", filename)
+    filename = re.sub(r"^\[.*]", "", filename)
     return filename.strip()
 
 
@@ -1102,14 +1102,14 @@ def find_imdbid(dir_name, input_name, omdb_api_key):
 
     # find imdbid in dirName
     logger.info('Searching folder and file names for imdbID ...')
-    m = re.search('(tt\d{7})', dir_name + input_name)
+    m = re.search(r'(tt\d{7})', dir_name + input_name)
     if m:
         imdbid = m.group(1)
         logger.info("Found imdbID [{0}]".format(imdbid))
         return imdbid
     if os.path.isdir(dir_name):
         for file in os.listdir(text_type(dir_name)):
-            m = re.search('(tt\d{7})', file)
+            m = re.search(r'(tt\d{7})', file)
             if m:
                 imdbid = m.group(1)
                 logger.info("Found imdbID [{0}] via file name".format(imdbid))