diff --git a/README.md b/README.md
index d9074c1..7fb850d 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ pip install pricehist
 - **`coindesk`**: [CoinDesk Bitcoin Price Index](https://www.coindesk.com/coindesk-api)
 - **`coinmarketcap`**: [CoinMarketCap](https://coinmarketcap.com/)
 - **`ecb`**: [European Central Bank Euro foreign exchange reference rates](https://www.ecb.europa.eu/stats/exchange/eurofxref/html/index.en.html)
+- **`yahoo`**: [Yahoo! Finance](https://finance.yahoo.com/)
 
 ## Output formats