diff --git a/README.md b/README.md
index cd87a00..8429a37 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ width               | width of the image in pixels
 height              | height of the image in pixels
 padding_x           | (optional) minimum distance in pixel between map features (lines, markers) and map border
 padding_y           | (optional) minimum distance in pixel between map features (lines, markers) and map border
-url_template        | (optional) the tile server URL for the map base layer, e.g. <code>http://a.tile.osm.org/{z}/{x}/{y}.png</code>
+url_template        | (optional) the tile server URL for the map base layer, e.g. <code>https://tile.openstreetmap.org/{z}/{x}/{y}.png</code>
 tile_size           | (optional) tile size in pixel, usually 256
 
 #### Add a line:
@@ -83,7 +83,7 @@ simplify      | whether to simplify coordinates, looks less shaky, default is tr
 ```python
 from staticmap import StaticMap, CircleMarker
 
-m = StaticMap(200, 200, url_template='http://a.tile.osm.org/{z}/{x}/{y}.png')
+m = StaticMap(200, 200, url_template='https://tile.openstreetmap.org/{z}/{x}/{y}.png')
 
 marker_outline = CircleMarker((10, 47), 'white', 18)
 marker = CircleMarker((10, 47), '#0036FF', 12)
@@ -137,4 +137,4 @@ With [papermap](https://github.com/sgraaf/papermap) there is also a spin-off pro
 ### Licence
 StaticMap is open source and licensed under Apache License, Version 2.0
 
-The map samples on this page are made with [OSM](http://www.osm.org) data, © [OpenStreetMap](http://www.openstreetmap.org/copyright) contributors
+The map samples on this page are made with [OSM](https://www.osm.org) data, © [OpenStreetMap](https://www.openstreetmap.org/copyright) contributors
diff --git a/staticmap/staticmap.py b/staticmap/staticmap.py
index 7378ec2..ca3f5a5 100644
--- a/staticmap/staticmap.py
+++ b/staticmap/staticmap.py
@@ -179,7 +179,7 @@ def _simplify(points, tolerance=11):
 
 
 class StaticMap:
-    def __init__(self, width, height, padding_x=0, padding_y=0, url_template="https://a.tile.openstreetmap.org/{z}/{x}/{y}.png", tile_size=256, tile_request_timeout=None, headers={"User-Agent": "StaticMap"}, reverse_y=False, background_color="#fff",
+    def __init__(self, width, height, padding_x=0, padding_y=0, url_template="https://tile.openstreetmap.org/{z}/{x}/{y}.png", tile_size=256, tile_request_timeout=None, headers={"User-Agent": "StaticMap"}, reverse_y=False, background_color="#fff",
                  delay_between_retries=0):
         """
         :param width: map width in pixel