diff --git a/README.md b/README.md
index 7a524f8..25cd31d 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,8 @@ Download and install the [workflow][download].
 These environment variables can be [configured in Alfred][env-vars]:
 
 - `PIRATE_WEATHER_API_KEY`: Get an API key [here][pirate-weather-api-key].
+- `PIRATE_WEATHER_ENDPOINT`: Set to `api.darksky.net` to use Dark Sky (until
+  the API is deprecated).
 - `GOOGLE_API_KEY`: Get an API key [here][google-api-key]. (Used for geocoding
   queries. *This can be omitted if you only want the forecast for the current
   location*.)
diff --git a/workflow/info.plist b/workflow/info.plist
index 09e4e0d..48aea3f 100644
--- a/workflow/info.plist
+++ b/workflow/info.plist
@@ -497,6 +497,8 @@ fi</string>
 	</array>
 	<key>readme</key>
 	<string>- `PIRATE_WEATHER_API_KEY`: Get an API key [here][pirate-weather-api-key].
+- `PIRATE_WEATHER_ENDPOINT`: Set to `api.darksky.net` to use Dark Sky (until
+  the API is deprecated).
 - `GOOGLE_API_KEY`: Get an API key [here][google-api-key]. (Used for geocoding
   queries. *This can be omitted if you only want the forecast for the current
   location*.)