diff --git a/mplleaflet/maptiles.py b/mplleaflet/maptiles.py
index 5234b03..5415301 100644
--- a/mplleaflet/maptiles.py
+++ b/mplleaflet/maptiles.py
@@ -1,52 +1,52 @@
 osm = (
-    'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
+    'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
     'Map data (c) <a href="http://openstreetmap.org">OpenStreetMap</a> contributors'
 )
 
 mapquest_open = (
-    'http://otile1.mqcdn.com/tiles/1.0.0/map/{z}/{x}/{y}.png',
+    'https://otile1.mqcdn.com/tiles/1.0.0/map/{z}/{x}/{y}.png',
     'Map tiles by <a href="http://open.mapquest.com/">MapQuest</a> Data by <a href="http://openstreetmap.org">OpenStreetMap</a>, under <a href="http://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>.'
 )
 
 mapbox_bright = (
-    'http://{s}.tiles.mapbox.com/v3/mapbox.world-bright/{z}/{x}/{y}.png',
+    'https://{s}.tiles.mapbox.com/v3/mapbox.world-bright/{z}/{x}/{y}.png',
     'Map tiles by <a href="http://www.mapbox.com/m">Mapbox</a> Data by <a href="http://openstreetmap.org">OpenStreetMap</a>, under <a href="http://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>.'
 )
 
 thunderforest_landscape = (
-    'http://{s}.tile.thunderforest.com/landscape/{z}/{x}/{y}.png',
+    'https://{s}.tile.thunderforest.com/landscape/{z}/{x}/{y}.png',
      '&copy; <a href="http://www.opencyclemap.org">OpenCycleMap</a>, &copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
 )
 
 
 esri_aerial = (
-    'http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}.png',
+    'https://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}.png',
     'Tiles &copy; Esri &mdash; Source: Esri, i-cubed, USDA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGN, IGP, UPR-EGP, and the GIS User Community'
 )
 
 esri_natgeo = (
-    'http://server.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer/tile/{z}/{y}/{x}.png',
+    'https://server.arcgisonline.com/ArcGIS/rest/services/NatGeo_World_Map/MapServer/tile/{z}/{y}/{x}.png',
     'Tiles &copy; Esri &mdash; National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, iPC'
 )
 
 esri_worldtopo = (
-    'http://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/{z}/{y}/{x}.png',
+    'https://server.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer/tile/{z}/{y}/{x}.png',
     'Tiles &copy; Esri &mdash; Esri, HERE, DeLorme, Intermap, increment P Corp., GEBCO, USGS, FAO, NPS, NRCAN, GeoBase, IGN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), swisstopo, MapmyIndia, &copy; OpenStreetMap contributors, GIS User Community'
 )
 
 stamen_wc = (
-    'http://{s}.tile.stamen.com/watercolor/{z}/{x}/{y}.png',
+    'https://{s}.tile.stamen.com/watercolor/{z}/{x}/{y}.png',
     'Map tiles by <a href="http://stamen.com">Stamen Design</a>, <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> &mdash; Map data &copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
 )
 
 stamen_toner = (
-    'http://a.tile.stamen.com/toner/{z}/{x}/{y}.png',
+    'https://a.tile.stamen.com/toner/{z}/{x}/{y}.png',
     'Map tiles by <a href="http://stamen.com">Stamen Design</a>, <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a> &mdash; Map data &copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a>'
 )
 
 
 cartodb_positron = (
-    'http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
+    'https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
     '&copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> &copy; <a href="http://cartodb.com/attributions">CartoDB</a>'
 )
 
@@ -64,7 +64,7 @@
     'esri_worldtopo': esri_worldtopo
 }
 
-_mb_url = 'http://{{s}}.tiles.mapbox.com/v3/{mapid}/{{z}}/{{x}}/{{y}}.png'
+_mb_url = 'https://{{s}}.tiles.mapbox.com/v3/{mapid}/{{z}}/{{x}}/{{y}}.png'
 _mb_attribution = '<a href="https://www.mapbox.com/about/maps/">Terms & Feedback</a>'
 def mapbox(mapid):
     url = _mb_url.format(mapid=mapid)