diff --git a/NuWeather/README.md b/NuWeather/README.md
index 816e687..c1a15d8 100644
--- a/NuWeather/README.md
+++ b/NuWeather/README.md
@@ -6,7 +6,7 @@ A weather plugin for Limnoria. It supports multiple weather and geocoding backen
 - [OpenWeatherMap](https://openweathermap.org/) (default, API key required)
 - [WWIS](https://worldweather.wmo.int/) (**no** API key required, major cities only)
 - [weatherstack](https://weatherstack.com/) (current conditions only, API key required)
-- [Dark Sky](https://darksky.net) (**DEPRECATED**: API key required; new signups closed)
+- [Pirate Weather](https://pirateweather.net/) (API key required)
 
 #### Geocoding Backends
 - [OpenStreetMap Nominatim](https://nominatim.openstreetmap.org/) (default, no API key required)
@@ -17,9 +17,9 @@ A weather plugin for Limnoria. It supports multiple weather and geocoding backen
 
 1) Pick your preferred weather backend: `config help plugins.NuWeather.defaultBackend`
 
-2) Grab an API key. [OpenWeatherMap](https://openweathermap.org/appid) | [weatherstack](https://weatherstack.com/) | ~~[Dark Sky](https://darksky.net/dev)~~ (new signups no longer accepted)
+2) Grab an API key. [OpenWeatherMap](https://openweathermap.org/appid) | [weatherstack](https://weatherstack.com/) | [Pirate Weather](https://pirateweather.net/getting-started)
 
-    - WWIS is another option that requires no API key, but is limited (in most countries) to major cities
+    - WWIS is another option that requires no API key, but is limited (in most countries) to major cities only
 
 3) Configure it: `/msg yourbot config plugins.NuWeather.apikeys.BACKENDNAME YOUR-API-KEY`
 
@@ -66,7 +66,7 @@ config plugins.NuWeather.DBAddressingMode nicks
 ## Location lookup (Geocoding) backends
 
 * weatherstack provides weather lookup by place name directly, and does not need further configuration.
-* OpenStreetMap, WWIS, and Dark Sky backends use a separate service to translate place names into GPS coordinates, a process known as **geocoding**.
+* OpenStreetMap, WWIS, and Pirate Weather backends use a separate service to translate place names into GPS coordinates, a process known as **geocoding**.
 
 The default geocoding backend is [OpenStreetMap's Nominatim](https://nominatim.openstreetmap.org/); this can be configured via the `plugins.NuWeather.geocodeBackend` option.
 
diff --git a/NuWeather/config.py b/NuWeather/config.py
index 84b03c7..d0d159c 100644
--- a/NuWeather/config.py
+++ b/NuWeather/config.py
@@ -77,7 +77,7 @@ conf.registerChannelValue(NuWeather.units, 'speed',
         $mi = mph, $km = km/h, $m = m/s.""")))
 
 # List of supported backends for weather & geocode. This is reused by plugin.py
-BACKENDS = ('openweathermap', 'darksky', 'weatherstack', 'wwis')
+BACKENDS = ('openweathermap', 'pirateweather', 'weatherstack', 'wwis')
 GEOCODE_BACKENDS = ('nominatim', 'googlemaps', 'opencage', 'weatherstack')
 
 def backend_requires_apikey(backend):
diff --git a/NuWeather/plugin.py b/NuWeather/plugin.py
index e9059de..30d14e6 100644
--- a/NuWeather/plugin.py
+++ b/NuWeather/plugin.py
@@ -372,11 +372,11 @@ class NuWeather(callbacks.Plugin):
                         for forecastdata in city_data['forecast']['forecastDay']]
         }
 
-    def _darksky_fetcher(self, location, geobackend=None):
-        """Grabs weather data from Dark Sky."""
-        apikey = self.registryValue('apikeys.darksky')
+    def _pirateweather_fetcher(self, location, geobackend=None):
+        """Grabs weather data from Pirate Weather."""
+        apikey = self.registryValue('apikeys.pirateweather')
         if not apikey:
-            raise callbacks.Error(_("Please configure the Dark Sky API key in plugins.nuweather.apikeys.darksky."))
+            raise callbacks.Error(_("Please configure the Pirate Weather API key in plugins.nuweather.apikeys.pirateweather."))
 
         # Convert location to lat,lon first
         latlon = self._geocode(location, geobackend=geobackend)
@@ -386,7 +386,7 @@ class NuWeather(callbacks.Plugin):
         lat, lon, display_name, geocodeid, geocode_backend = latlon
 
         # We don't use minutely or hourly data; alerts are not supported yet
-        url = 'https://api.darksky.net/forecast/%s/%s,%s?units=us&exclude=minutely,hourly,alerts' % (apikey, lat, lon)
+        url = 'https://api.pirateweather.net/forecast/%s/%s,%s?units=us&exclude=minutely,hourly,alerts' % (apikey, lat, lon)
         self.log.debug('NuWeather: using url %s', url)
 
         f = utils.web.getUrl(url, headers=HEADERS).decode('utf-8')
@@ -397,8 +397,8 @@ class NuWeather(callbacks.Plugin):
         # N.B. Dark Sky docs tell to not expect any values to exist except the timestamp attached to the response
         return {
             'location': display_name,
-            'poweredby': 'Dark\xa0Sky+' + geocode_backend,
-            'url': 'https://darksky.net/forecast/%s,%s' % (lat, lon),
+            'poweredby': 'Pirate\xa0Weather+' + geocode_backend,
+            'url': 'https://merrysky.net/forecast/%s,%s' % (lat, lon),
             'current': {
                 'condition': currentdata.get('summary', 'N/A'),
                 'temperature': self._format_tmpl_temp(f=currentdata.get('temperature')),