diff --git a/Formula/kdiff3.rb b/Formula/kdiff3.rb
deleted file mode 100644
index 9aa0e2db9a4..00000000000
--- a/Formula/kdiff3.rb
+++ /dev/null
@@ -1,29 +0,0 @@
-class Kdiff3 < Formula
-  desc "Compare and merge 2 or 3 files or directories"
-  homepage "http://kdiff3.sourceforge.net/"
-  url "https://downloads.sourceforge.net/project/kdiff3/kdiff3/0.9.98/kdiff3-0.9.98.tar.gz"
-  sha256 "802c1ababa02b403a5dca15955c01592997116a24909745016931537210fd668"
-
-  bottle do
-    cellar :any
-    sha256 "33016974737b654b3b65f86c1485dfb377c23efa2c60efc08bbac48e40e333f6" => :el_capitan
-    sha256 "50c90cad74a8393f859ae7f04b285c250361c49dddf88509f8292ebebc55c859" => :yosemite
-    sha256 "8ddc33a57befb206127bcbe2a4ef4b4251830665945ba9170902231a63bddaf2" => :mavericks
-  end
-
-  depends_on "qt"
-
-  def install
-    # configure builds the binary
-    system "./configure", "qt4"
-    prefix.install "releaseQt/kdiff3.app"
-    bin.install_symlink prefix+"kdiff3.app/Contents/MacOS/kdiff3"
-  end
-
-  test do
-    (testpath/"test1.in").write "test"
-    (testpath/"test2.in").write "test"
-    system "#{bin}/kdiff3", "--auto", "test1.in", "test2.in", "-o", "test.out"
-    assert (testpath/"test.out").exist?
-  end
-end
diff --git a/tap_migrations.json b/tap_migrations.json
index dba9f2bfa29..ad2fbf6fead 100644
--- a/tap_migrations.json
+++ b/tap_migrations.json
@@ -132,6 +132,7 @@
   "judy": "homebrew/boneyard",
   "justniffer": "homebrew/boneyard",
   "kbtin": "homebrew/boneyard",
+  "kdiff3": "caskroom/cask",
   "kernagic": "homebrew/gui",
   "kismet": "homebrew/boneyard",
   "klavaro": "homebrew/gui",