diff --git a/nc-api b/nc-api
index dad7124..e03589e 100755
--- a/nc-api
+++ b/nc-api
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 
 # TODO:
 #  - Add support for TTL, MXPref, ...
@@ -86,7 +86,7 @@ def config_load(pathname):
     if not os.path.exists(pathname):
         raise RuntimeError("Configuration file %s does not exist" % (pathname))
     st = os.stat(pathname)
-    if (st.st_mode & 077) != 0:
+    if (st.st_mode & 0o077) != 0:
         raise RuntimeError("Configuration file %s has incorrect permissions" % (pathname))
     config['debug'] = False
     config['verbose'] = False