--- a/nfsometerlib/config.py
+++ b/nfsometerlib/config.py
@@ -173,9 +173,9 @@
 }
 
 # mountopt version parsers
-_RE_VERS_NEW = re.compile('^v(\d+)(\.\d+)?$')
-_RE_VERS_OLD_MAJOR = re.compile('^vers=(\d+)$')
-_RE_VERS_OLD_MINOR = re.compile('^minorversion=(\d+)$')
+_RE_VERS_NEW = re.compile(r'^v(\d+)(\.\d+)?$')
+_RE_VERS_OLD_MAJOR = re.compile(r'^vers=(\d+)$')
+_RE_VERS_OLD_MINOR = re.compile(r'^minorversion=(\d+)$')
 
 def _mountopts_splitvers(mountopt):
     """ return normalized string form of NFS protocol version from mountopt
--- a/nfsometerlib/options.py
+++ b/nfsometerlib/options.py
@@ -577,14 +577,14 @@
 
         if not man:
             # strip man formatting
-            return re.sub('\\\\f\S', '', fmt)
+            return re.sub(r'\\\\f\S', '', fmt)
 
         return fmt
 
     def _examples(self, man=False):
         if not man:
             # strip man formatting
-            return re.sub('\\\\f\S', '',
+            return re.sub(r'\\\\f\S', '',
                           self._examples_fmt % {'script': _progname})
 
         return self._examples_fmt % {'script': 'nfsometer'}