diff --git a/lnbits/settings.py b/lnbits/settings.py
index 027c40df2..30dd6f621 100644
--- a/lnbits/settings.py
+++ b/lnbits/settings.py
@@ -67,7 +67,15 @@ class ThemesSettings(LNbitsSettings):
     lnbits_site_description: str = Field(default=None)
     lnbits_default_wallet_name: str = Field(default="LNbits wallet")
     lnbits_theme_options: List[str] = Field(
-        default=["classic", "freedom", "mint", "salvador", "monochrome", "autumn", "cyber"]
+        default=[
+            "classic",
+            "freedom",
+            "mint",
+            "salvador",
+            "monochrome",
+            "autumn",
+            "cyber",
+        ]
     )
     lnbits_custom_logo: str = Field(default=None)
     lnbits_ad_space_title: str = Field(default="Supported by")