Index: applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignsPlugin.java
===================================================================
--- applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignsPlugin.java	(revision 30359)
+++ applications/editors/josm/plugins/roadsigns/src/org/openstreetmap/josm/plugins/roadsigns/RoadSignsPlugin.java	(revision 30360)
@@ -243,5 +243,5 @@
     public static InputStream getInputStream(String source) throws IOException {
         InputStream in = null;
-        if (source.startsWith("http://") || source.startsWith("ftp://")) {
+        if (source.startsWith("http://") || source.startsWith("https://") || source.startsWith("ftp://")) {
             in = new MirroredInputStream(source);
         } else if (source.startsWith("file:")) {