diff --git a/adapters/google.py b/adapters/google.py
index 170d221..062a3ec 100644
--- a/adapters/google.py
+++ b/adapters/google.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
 import tempfile
 import datetime
 import os.path
diff --git a/adapters/utils.py b/adapters/utils.py
index f44eac2..f7e5000 100644
--- a/adapters/utils.py
+++ b/adapters/utils.py
@@ -1,9 +1,9 @@
-import collections
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 
-
-def dict_merge(dct, merge_dct):
-    for k, v in merge_dct.items():
-        if (k in dct and isinstance(dct[k], dict) and isinstance(merge_dct[k], dict)):  #noqa
-            dict_merge(dct[k], merge_dct[k])
+def dict_merge(d0, d1):
+    for k, v in d1.items():
+        if (k in d0 and isinstance(d0[k], dict) and isinstance(d1[k], dict)):
+            dict_merge(d0[k], d1[k])
         else:
-            dct[k] = merge_dct[k]
+            d0[k] = d1[k]
diff --git a/adapters/wordpress.py b/adapters/wordpress.py
index 3d0e2f5..dac69e8 100644
--- a/adapters/wordpress.py
+++ b/adapters/wordpress.py
@@ -1,3 +1,6 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
 import requests
 import urllib.parse
 import json
diff --git a/main.py b/main.py
index 7a90b1a..fe598b6 100755
--- a/main.py
+++ b/main.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 
 import sys
 import yaml