diff --git a/krebs/3modules/realwallpaper.nix b/krebs/3modules/realwallpaper.nix
index 1564bd94a..f9eae8c92 100644
--- a/krebs/3modules/realwallpaper.nix
+++ b/krebs/3modules/realwallpaper.nix
@@ -24,7 +24,7 @@ let
 
     daymap = mkOption {
       type = types.str;
-      default = "http://www.nnvl.noaa.gov/images/globaldata/SnowIceCover_Daily.png";
+      default = "https://www.nnvl.noaa.gov/images/globaldata/SnowIceCover_Daily.png";
     };
 
     cloudmap = mkOption {