diff --git a/gendiff/formatters/stylish_format.py b/gendiff/formatters/stylish_format.py
index c418832..0e0984b 100644
--- a/gendiff/formatters/stylish_format.py
+++ b/gendiff/formatters/stylish_format.py
@@ -1,6 +1,6 @@
 def dict_to_string(d, depth):
     result = ""
-    indent_space = "    " * (depth+1)
+    indent_space = "    " * (depth + 1)
     result += "{\n"
     for key, value in d.items():
         result += f"{indent_space}    {key}: "
diff --git a/gendiff/stuff/diff_build.py b/gendiff/stuff/diff_build.py
index 6a9cfbe..b42ede6 100644
--- a/gendiff/stuff/diff_build.py
+++ b/gendiff/stuff/diff_build.py
@@ -17,7 +17,7 @@ def diff_build(dict1, dict2, depth=0):
             diff.append({'status': 'added', 'key': key, 'depth': depth,
                          'value': format_value(dict2[key])})
         elif isinstance(dict1[key], dict) and isinstance(dict2[key], dict):
-            nested_diff = diff_build(dict1[key], dict2[key], depth+1)
+            nested_diff = diff_build(dict1[key], dict2[key], depth + 1)
             diff.append({'status': 'nested', 'key': key, 'depth': depth,
                          'value': nested_diff})
         elif dict1[key] == dict2[key]: