diff --git a/offlineimap/CustomConfig.py b/offlineimap/CustomConfig.py
index dae20b6..e00b59d 100644
--- a/offlineimap/CustomConfig.py
+++ b/offlineimap/CustomConfig.py
@@ -49,7 +49,7 @@ class CustomConfigParser(SafeConfigParser):
     def getmetadatadir(self):
         metadatadir = os.path.expanduser(self.getdefault("general", "metadata", "~/.offlineimap"))
         if not os.path.exists(metadatadir):
-            os.mkdir(metadatadir, 0700)
+            os.mkdir(metadatadir, 0o700)
         return metadatadir
 
     def getlocaleval(self):
diff --git a/offlineimap/accounts.py b/offlineimap/accounts.py
index 780ad04..429dc19 100644
--- a/offlineimap/accounts.py
+++ b/offlineimap/accounts.py
@@ -216,7 +216,7 @@ class SyncableAccount(Account):
         self.ui.registerthread(self)
         accountmetadata = self.getaccountmeta()
         if not os.path.exists(accountmetadata):
-            os.mkdir(accountmetadata, 0700)
+            os.mkdir(accountmetadata, 0o700)
 
         self.remoterepos = Repository(self, 'remote')
         self.localrepos  = Repository(self, 'local')
diff --git a/offlineimap/folder/Maildir.py b/offlineimap/folder/Maildir.py
index e778bfd..11541e4 100644
--- a/offlineimap/folder/Maildir.py
+++ b/offlineimap/folder/Maildir.py
@@ -256,7 +256,7 @@ class MaildirFolder(BaseFolder):
         # open file and write it out
         try:
             fd = os.open(os.path.join(tmpdir, messagename),
-                           os.O_EXCL|os.O_CREAT|os.O_WRONLY, 0666)
+                           os.O_EXCL|os.O_CREAT|os.O_WRONLY, 0o666)
         except OSError as e:
             if e.errno == 17: 
                 #FILE EXISTS ALREADY
diff --git a/offlineimap/repository/Base.py b/offlineimap/repository/Base.py
index bc2c15a..a096a15 100644
--- a/offlineimap/repository/Base.py
+++ b/offlineimap/repository/Base.py
@@ -35,13 +35,13 @@ class BaseRepository(object, CustomConfig.ConfigHelperMixin):
         self._accountname = self.account.getname()
         self.uiddir = os.path.join(self.config.getmetadatadir(), 'Repository-' + self.name)
         if not os.path.exists(self.uiddir):
-            os.mkdir(self.uiddir, 0700)
+            os.mkdir(self.uiddir, 0o700)
         self.mapdir = os.path.join(self.uiddir, 'UIDMapping')
         if not os.path.exists(self.mapdir):
-            os.mkdir(self.mapdir, 0700)
+            os.mkdir(self.mapdir, 0o700)
         self.uiddir = os.path.join(self.uiddir, 'FolderValidity')
         if not os.path.exists(self.uiddir):
-            os.mkdir(self.uiddir, 0700)
+            os.mkdir(self.uiddir, 0o700)
 
         self.nametrans = lambda foldername: foldername
         self.folderfilter = lambda foldername: 1
diff --git a/offlineimap/repository/LocalStatus.py b/offlineimap/repository/LocalStatus.py
index fdd1e19..b1e9fd0 100644
--- a/offlineimap/repository/LocalStatus.py
+++ b/offlineimap/repository/LocalStatus.py
@@ -41,7 +41,7 @@ class LocalStatusRepository(BaseRepository):
                                 % (backend, account.name))
 
         if not os.path.exists(self.root):
-            os.mkdir(self.root, 0700)
+            os.mkdir(self.root, 0o700)
 
         # self._folders is a list of LocalStatusFolders()
         self._folders = None
diff --git a/offlineimap/repository/Maildir.py b/offlineimap/repository/Maildir.py
index 139ddb4..67f659b 100644
--- a/offlineimap/repository/Maildir.py
+++ b/offlineimap/repository/Maildir.py
@@ -37,7 +37,7 @@ class MaildirRepository(BaseRepository):
 
         # Create the top-level folder if it doesn't exist
         if not os.path.isdir(self.root):
-            os.mkdir(self.root, 0700)
+            os.mkdir(self.root, 0o700)
 
     def _append_folder_atimes(self, foldername):
         """Store the atimes of a folder's new|cur in self.folder_atimes"""
@@ -97,7 +97,7 @@ class MaildirRepository(BaseRepository):
         # sub-folders may be created before higher-up ones.
         self.debug("makefolder: calling makedirs '%s'" % full_path)
         try:
-            os.makedirs(full_path, 0700)
+            os.makedirs(full_path, 0o700)
         except OSError as e:
             if e.errno == 17 and os.path.isdir(full_path):
                 self.debug("makefolder: '%s' already a directory" % foldername)
@@ -105,7 +105,7 @@ class MaildirRepository(BaseRepository):
                 raise
         for subdir in ['cur', 'new', 'tmp']:
             try:
-                os.mkdir(os.path.join(full_path, subdir), 0700)
+                os.mkdir(os.path.join(full_path, subdir), 0o700)
             except OSError as e:
                 if e.errno == 17 and os.path.isdir(full_path):
                     self.debug("makefolder: '%s' already has subdir %s" %