diff --git a/config/environments/development.js.example b/config/environments/development.js.example
index 57e831f5..55b3739d 100644
--- a/config/environments/development.js.example
+++ b/config/environments/development.js.example
@@ -131,6 +131,7 @@ var config = {
           timeout: 2000, // the timeout in ms for a http tile request
           proxy: undefined, // the url for a proxy server
           whitelist: [ // the whitelist of urlTemplates that can be used
+              '.*', // will enable any URL
               'http://{s}.example.com/{z}/{x}/{y}.png'
           ],
           // image to use as placeholder when urlTemplate is not in the whitelist
diff --git a/config/environments/production.js.example b/config/environments/production.js.example
index 89106528..731ff573 100644
--- a/config/environments/production.js.example
+++ b/config/environments/production.js.example
@@ -125,6 +125,7 @@ var config = {
           timeout: 2000, // the timeout in ms for a http tile request
           proxy: undefined, // the url for a proxy server
           whitelist: [ // the whitelist of urlTemplates that can be used
+              '.*', // will enable any URL
               'http://{s}.example.com/{z}/{x}/{y}.png'
           ],
           // image to use as placeholder when urlTemplate is not in the whitelist
diff --git a/config/environments/staging.js.example b/config/environments/staging.js.example
index c104b088..c3c9d2a1 100644
--- a/config/environments/staging.js.example
+++ b/config/environments/staging.js.example
@@ -125,6 +125,7 @@ var config = {
           timeout: 2000, // the timeout in ms for a http tile request
           proxy: undefined, // the url for a proxy server
           whitelist: [ // the whitelist of urlTemplates that can be used
+              '.*', // will enable any URL
               'http://{s}.example.com/{z}/{x}/{y}.png'
           ],
           // image to use as placeholder when urlTemplate is not in the whitelist
diff --git a/config/environments/test.js.example b/config/environments/test.js.example
index b45842ae..aa9e3a1a 100644
--- a/config/environments/test.js.example
+++ b/config/environments/test.js.example
@@ -125,6 +125,7 @@ var config = {
           timeout: 2000, // the timeout in ms for a http tile request
           proxy: undefined, // the url for a proxy server
           whitelist: [ // the whitelist of urlTemplates that can be used
+              '.*', // will enable any URL
               'http://{s}.example.com/{z}/{x}/{y}.png',
               // for testing purposes
               'http://{s}.basemaps.cartocdn.com/dark_nolabels/{z}/{x}/{y}.png'