diff --git a/dotty.rb b/dotty.rb
index 8b4e18e..7b8f09e 100644
--- a/dotty.rb
+++ b/dotty.rb
@@ -1,8 +1,8 @@
 class Dotty < Formula
   desc "Experimental Scala Compiler"
   homepage "http://dotty.epfl.ch/"
-  url "https://github.com/lampepfl/homebrew-brew/releases/download/v0.1-M1/dotty-0.1.1-bin-SNAPSHOT.zip"
-  sha256 "d5091aea45679c28774bb2039847a36a7c1f2a1abbe4ae9f79bf669afbca0232"
+  url "https://github.com/lampepfl/homebrew-brew/releases/download/v0.1-M2/dotty-0.1.1-bin-SNAPSHOT.zip"
+  sha256 "03d40979cfd265aecbdd5f4d8bed091b2328bdf54230ce42fffd039d9ee18a86"
   # mirror "https://www.scala-lang.org/files/archive/scala-2.12.2.tgz"
 
   bottle :unneeded
@@ -15,6 +15,7 @@ def install
   end
 
   test do
+    # test dotc and dotr:
     file = testpath/"Test.scala"
     file.write <<-EOS.undent
       object Test {
@@ -28,5 +29,16 @@ def main(args: Array[String]) = {
     out = shell_output("#{bin}/dotr Test").strip
 
     assert_equal "4", out
+
+    # test dotd:
+    Dir.mkdir "#{testpath}/site"
+    index_out = testpath/"site"/"index.md"
+    index_out.write <<-EOS.undent
+    Hello, world!
+    =============
+    EOS
+    shell_output("#{bin}/dotd -siteroot #{testpath}/site #{file}")
+    index_file = File.open("#{testpath}/site/_site/index.html", "rb").read
+    assert index_file.include? '<h1><a href="#hello-world" id="hello-world">Hello, world!</a></h1>'
   end
 end