diff --git a/app/config/settings.py b/app/config/settings.py
index 796cdad..03c9906 100644
--- a/app/config/settings.py
+++ b/app/config/settings.py
@@ -29,7 +29,6 @@ class Settings(BaseSettings):
     CEREBRAS_API_KEY: str = ""
 
     LLM_MODEL: str = "gpt-4o"
-    LLM_ROUTER_MODEL: str = "gpt-4o-mini"
     LLM_EMBED_MODEL: str = "text-embedding-3-small"
 
     # GitHub Copilot OAuth token storage directory.
@@ -54,7 +53,9 @@ class Settings(BaseSettings):
 
     ENV: Literal["dev", "prod"] = "dev"
 
-    model_config = SettingsConfigDict(env_file=".env", env_file_encoding="utf-8")
+    model_config = SettingsConfigDict(
+        env_file=".env", env_file_encoding="utf-8", extra="ignore"
+    )
 
 
 settings = Settings()