diff --git a/backend/src/ea_chatbot/config.py b/backend/src/ea_chatbot/config.py
index 19a218f..572f122 100644
--- a/backend/src/ea_chatbot/config.py
+++ b/backend/src/ea_chatbot/config.py
@@ -37,6 +37,7 @@ class Settings(BaseSettings):
     secret_key: str = Field(default="change-me-in-production", alias="SECRET_KEY")
     algorithm: str = Field(default="HS256", alias="ALGORITHM")
     access_token_expire_minutes: int = Field(default=30, alias="ACCESS_TOKEN_EXPIRE_MINUTES")
+    refresh_token_expire_days: int = Field(default=7, alias="REFRESH_TOKEN_EXPIRE_DAYS")
 
     # OIDC Configuration
     oidc_client_id: Optional[str] = Field(default=None, alias="OIDC_CLIENT_ID")
diff --git a/backend/tests/test_config.py b/backend/tests/test_config.py
index 96076e6..3032ab7 100644
--- a/backend/tests/test_config.py
+++ b/backend/tests/test_config.py
@@ -42,4 +42,15 @@ def test_oidc_settings(monkeypatch):
     settings = Settings()
     assert settings.oidc_client_id == "test_client_id"
     assert settings.oidc_client_secret == "test_client_secret"
-    assert settings.oidc_server_metadata_url == "https://test.server/.well-known/openid-configuration"
\ No newline at end of file
+    assert settings.oidc_server_metadata_url == "https://test.server/.well-known/openid-configuration"
+
+def test_refresh_token_settings():
+    """Test that refresh token settings are loaded correctly."""
+    settings = Settings()
+    assert settings.refresh_token_expire_days == 7
+
+def test_refresh_token_env_override(monkeypatch):
+    """Test that refresh token settings can be overridden by env vars."""
+    monkeypatch.setenv("REFRESH_TOKEN_EXPIRE_DAYS", "30")
+    settings = Settings()
+    assert settings.refresh_token_expire_days == 30