diff --git a/shimatta_kenkyusho/shimatta_kenkyusho/settings_production.py b/shimatta_kenkyusho/shimatta_kenkyusho/settings_production.py
index d1e5225..43c9681 100644
--- a/shimatta_kenkyusho/shimatta_kenkyusho/settings_production.py
+++ b/shimatta_kenkyusho/shimatta_kenkyusho/settings_production.py
@@ -29,13 +29,13 @@ import os
 BASE_DIR = Path(__file__).resolve().parent.parent
 
 def get_env_value(env_variable, default=None):
-	try:
-	  	return os.environ[env_variable]
-	except KeyError:
-		if default is not None:
+    try:
+        return os.environ[env_variable]
+    except KeyError:
+        if default is not None:
             return default
         error_msg = 'Set the {} environment variable'.format(env_variable)
-		raise Exception(error_msg)
+        raise Exception(error_msg)
 
 
 # Quick-start development settings - unsuitable for production