diff --git a/libtisbackup/backup_oracle.py b/libtisbackup/backup_oracle.py
index 3d93510..8311b79 100644
--- a/libtisbackup/backup_oracle.py
+++ b/libtisbackup/backup_oracle.py
@@ -86,7 +86,7 @@ class backup_oracle(backup_generic):
 
                 file = open(localpath)
                 for line in file:
-                    if re.search('EXP-[0-9]+:', line) and not re.match('EXP-[0-9]+:', line).group(0).replace(':','') in self.ignore_error_oracle_code:
+                    if re.search(r'EXP-[0-9]+:', line) and not re.match(r'EXP-[0-9]+:', line).group(0).replace(':','') in self.ignore_error_oracle_code:
                         stats['status']='RMTemp'
                         self.clean_dumpfiles(dumpfile,dumplog)
                         raise Exception('Aborting, Not null exit code (%s) for "%s"' % (re.match('EXP-[0-9]+:', line).group(0).replace(':',''),cmd))
diff --git a/libtisbackup/backup_switch.py b/libtisbackup/backup_switch.py
index a5d11a1..6604b58 100644
--- a/libtisbackup/backup_switch.py
+++ b/libtisbackup/backup_switch.py
@@ -199,7 +199,7 @@ class backup_switch(backup_generic):
         child.expect('#--')
         child.expect("#")
         child.close()
-        myre = re.compile("#--+")
+        myre = re.compile(r"#--+")
         config = myre.split(open(filename).read())[2]
         with open(filename,'w') as f:
             f.write(config)
diff --git a/libtisbackup/backup_xva.py b/libtisbackup/backup_xva.py
index d91634d..4e82d2a 100755
--- a/libtisbackup/backup_xva.py
+++ b/libtisbackup/backup_xva.py
@@ -60,7 +60,7 @@ class backup_xva(backup_generic):
         tar = tarfile.open(filename)
         members = tar.getmembers()
         for tarinfo in members:
-            if re.search('^[0-9]*$',os.path.basename(tarinfo.name)):
+            if re.search(r'^[0-9]*$',os.path.basename(tarinfo.name)):
                 sha1sum = hashlib.sha1(tar.extractfile(tarinfo).read()).hexdigest()
                 sha1sum2 = tar.extractfile(tarinfo.name+'.checksum').read()
                 if not sha1sum == sha1sum2:
diff --git a/libtisbackup/common.py b/libtisbackup/common.py
index 25a1832..45846d3 100644
--- a/libtisbackup/common.py
+++ b/libtisbackup/common.py
@@ -526,7 +526,7 @@ class backup_generic(ABC):
     ssh_port=22
 
     def __init__(self,backup_name, backup_dir,dbstat=None,dry_run=False):
-        if not re.match('^[A-Za-z0-9_\-\.]*$',backup_name):
+        if not re.match(r'^[A-Za-z0-9_\-\.]*$',backup_name):
             raise Exception('The backup name %s should contain only alphanumerical characters' % backup_name)
         self.backup_name = backup_name
         self.backup_dir = backup_dir
@@ -889,7 +889,7 @@ class backup_generic(ABC):
 
                     for l in log.splitlines():
                         if l.startswith('Number of files:'):
-                            stats['total_files_count'] += int(re.findall('[0-9]+', l.split(':')[1])[0])
+                            stats['total_files_count'] += int(re.findall(r'[0-9]+', l.split(':')[1])[0])
                         if l.startswith('Number of files transferred:'):
                             stats['written_files_count'] += int(l.split(':')[1])
                         if l.startswith('Total file size:'):
diff --git a/libtisbackup/iniparse/ini.py b/libtisbackup/iniparse/ini.py
index dc47621..aad1b07 100644
--- a/libtisbackup/iniparse/ini.py
+++ b/libtisbackup/iniparse/ini.py
@@ -357,7 +357,7 @@ class INISection(config.ConfigNamespace):
             else:
                 raise
         if del_empty:
-            value = re.sub('\n+', '\n', value)
+            value = re.sub(r'\n+', r'\n', value)
         return value
 
     def _getitem(self, key):
diff --git a/tisbackup_gui.py b/tisbackup_gui.py
index b928091..29d139c 100755
--- a/tisbackup_gui.py
+++ b/tisbackup_gui.py
@@ -286,7 +286,7 @@ def check_usb_disk():
     usb_disk_list = []
     for name in glob.glob('/dev/sd[a-z]'):
         for line in os.popen("udevadm info -q env -n %s" % name):
-            if re.match("ID_PATH=.*usb.*", line):
+            if re.match(r"ID_PATH=.*usb.*", line):
                 usb_disk_list += [ name ]
 
     if len(usb_disk_list) == 0: