diff --git a/appveyor.yml b/appveyor.yml
index 20eb3ca..2234d86 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -31,16 +31,16 @@ install:
         {
             $version = $env:DVersion;
             if($version -eq "stable") {
-                $latest = (Invoke-WebRequest "http://downloads.dlang.org/releases/LATEST").toString();
-                $url = "http://downloads.dlang.org/releases/2.x/$($latest)/dmd.$($latest).windows.7z";
+                $latest = (Invoke-WebRequest "https://downloads.dlang.org/releases/LATEST").toString();
+                $url = "https://downloads.dlang.org/releases/2.x/$($latest)/dmd.$($latest).windows.7z";
             }elseif($version -eq "beta") {
-                $latest = (Invoke-WebRequest "http://downloads.dlang.org/pre-releases/LATEST").toString();
+                $latest = (Invoke-WebRequest "https://downloads.dlang.org/pre-releases/LATEST").toString();
                 $latestVersion = $latest.split("-")[0].split("~")[0];
-                $url = "http://downloads.dlang.org/pre-releases/2.x/$($latestVersion)/dmd.$($latest).windows.7z";
+                $url = "https://downloads.dlang.org/pre-releases/2.x/$($latestVersion)/dmd.$($latest).windows.7z";
             }elseif($version -eq "nightly") {
-                $url = "http://nightlies.dlang.org/dmd-master-2017-05-20/dmd.master.windows.7z"
+                $url = "https://nightlies.dlang.org/dmd-master-2017-05-20/dmd.master.windows.7z"
             }else {
-                $url = "http://downloads.dlang.org/releases/2.x/$($version)/dmd.$($version).windows.7z";
+                $url = "https://downloads.dlang.org/releases/2.x/$($version)/dmd.$($version).windows.7z";
             }
             $env:PATH += ";C:\dmd2\windows\bin;";
             return $url;