diff --git a/management/utils.py b/management/utils.py
index 879776c3..5a036103 100644
--- a/management/utils.py
+++ b/management/utils.py
@@ -21,8 +21,7 @@ def load_env_vars_from_file(fn):
 
 def save_environment(env):
     with open("/etc/mailinabox.conf", "w", encoding="utf-8") as f:
-        for k, v in env.items():
-            f.write(f"{k}={v}\n")
+        f.writelines(f"{k}={v}\n" for k, v in env.items())
 
 # THE SETTINGS FILE AT STORAGE_ROOT/settings.yaml.