diff --git a/lib/open_weather/api.rb b/lib/open_weather/api.rb
index 62aaa3f..15589f0 100644
--- a/lib/open_weather/api.rb
+++ b/lib/open_weather/api.rb
@@ -34,7 +34,7 @@ def cities(ids, options = {})
         raise LocationsLimitExceeded
       end
 
-      url = 'http://api.openweathermap.org/data/2.5/group'
+      url = Base::API_URL + '/group'
       ids = encode_array ids
       new(options.merge(id: ids)).retrieve url
     end
@@ -44,7 +44,7 @@ def cities(ids, options = {})
     def rectangle_zone(top_left_lat, top_left_lon,
                        bottom_right_lat, bottom_right_lon,
                        map_zoom, options = {})
-      url = 'http://api.openweathermap.org/data/2.5/box/city'
+      url = Base::API_URL + '/box/city'
       bbox = encode_array [top_left_lat, top_left_lon, bottom_right_lat,
               bottom_right_lon, map_zoom]
       new(options.merge(bbox: bbox)).retrieve url
@@ -53,7 +53,7 @@ def rectangle_zone(top_left_lat, top_left_lon,
     # Circle zone (lat, lon and count of cities to return)
     # Usage: OpenWeather::Current.circle_zone(55.5, 37.5, 10)
     def circle_zone(lat, lon, count, options = {})
-      url = 'http://api.openweathermap.org/data/2.5/find'
+      url = Base::API_URL + '/find'
       new(options.merge(lat: lat, lon: lon, cnt: count)).retrieve url
     end
 
diff --git a/lib/open_weather/base.rb b/lib/open_weather/base.rb
index f34cf94..5e50782 100644
--- a/lib/open_weather/base.rb
+++ b/lib/open_weather/base.rb
@@ -3,7 +3,8 @@
 
 module OpenWeather
   class Base
-
+    API_URL = 'https://api.openweathermap.org/data/2.5'
+    
     attr_reader :url, :options, :weather_info, :status, :message
 
     def initialize(url, options)
diff --git a/lib/open_weather/current.rb b/lib/open_weather/current.rb
index 76ccaf2..05a7f49 100644
--- a/lib/open_weather/current.rb
+++ b/lib/open_weather/current.rb
@@ -1,7 +1,7 @@
 module OpenWeather
   class Current < Base
     def initialize(options = {})
-      super('http://api.openweathermap.org/data/2.5/weather', options)
+      super(API_URL + '/weather', options)
     end
   end
 end
diff --git a/lib/open_weather/find.rb b/lib/open_weather/find.rb
index 608f23c..80bf236 100644
--- a/lib/open_weather/find.rb
+++ b/lib/open_weather/find.rb
@@ -1,7 +1,7 @@
 module OpenWeather
   class Find < Base
     def initialize(options = {})
-      super('http://api.openweathermap.org/data/2.5/find', options)
+      super(API_URL + '/find', options)
     end
 
     def self.like(q, options = {})
diff --git a/lib/open_weather/forecast.rb b/lib/open_weather/forecast.rb
index 5911314..d4d6f4f 100644
--- a/lib/open_weather/forecast.rb
+++ b/lib/open_weather/forecast.rb
@@ -1,7 +1,7 @@
 module OpenWeather
   class Forecast < Base
     def initialize options = {}
-      super('http://api.openweathermap.org/data/2.5/forecast', options)
+      super(API_URL + '/forecast', options)
     end
   end
 end
diff --git a/lib/open_weather/forecast_daily.rb b/lib/open_weather/forecast_daily.rb
index 06a26a7..694bfe2 100644
--- a/lib/open_weather/forecast_daily.rb
+++ b/lib/open_weather/forecast_daily.rb
@@ -1,7 +1,7 @@
 module OpenWeather
   class ForecastDaily < Base
     def initialize options = {}
-      super('http://api.openweathermap.org/data/2.5/forecast/daily', options)
+      super(API_URL + '/forecast/daily', options)
     end
   end
 end