diff --git a/source/_components/sensor.openexchangerates.markdown b/source/_components/sensor.openexchangerates.markdown
index 8041e159d56..e237b289b63 100644
--- a/source/_components/sensor.openexchangerates.markdown
+++ b/source/_components/sensor.openexchangerates.markdown
@@ -23,15 +23,16 @@ To enable this sensor, add the following lines to your `configuration.yaml` file
 ```yaml
 # Example configuration.yaml entry
 sensor:
-  platform: openexchangerates
-  api_key: your_api_key
-  base: USD #optional
-  quote: EUR
-  name: USDEUR #optional
+  - platform: openexchangerates
+    api_key: YOUR_API_KEY
+    base: USD
+    quote: EUR
+    name: USDEUR
 ```
 
 Configuration variables:
 
+- **api_key** (*Required*): API Key for [Open Exchange Rates](https://openexchangerates.org).
 - **name** (*Optional*): Name to use in the frontend.
 - **base** (*Optional*): The symbol of the base currency. Defaults to USD 
 - **quote** (*Required*): The symbol of the quote or target currency.