diff --git a/Formula/vault.rb b/Formula/vault.rb
deleted file mode 100644
index 88a9636..0000000
--- a/Formula/vault.rb
+++ /dev/null
@@ -1,30 +0,0 @@
-class Vault < Formula
-  desc "Post-quantum encrypted file vault with a decoy passphrase"
-  homepage "https://dixon.cx/vault"
-  url "https://github.com/andydixon/vault/archive/refs/tags/0.6.tar.gz"
-  sha256 "0019dfc4b32d63c1392aa264aed2253c1e0c2fb09216f8e2cc269bbfb8bb49b5"
-  license "GPL-3.0-or-later"
-  head "https://github.com/andydixon/vault.git", branch: "master"
-
-  depends_on "rust" => :build
-
-  conflicts_with "hashicorp/tap/vault", because: "both install a `vault` binary"
-
-  def install
-    system "cargo", "install", *std_cargo_args
-    man1.install Dir["docs/*.1"]
-  end
-
-  test do
-    ENV["VAULT_PASSPHRASE"] = "brew test passphrase"
-    ENV["VAULT_KEY"] = (testpath/"key").to_s
-    ENV["VAULT_DIR"] = (testpath/"store").to_s
-    system bin/"vault", "genkey"
-    system bin/"vault", "init"
-    (testpath/"hello.txt").write "hello"
-    system bin/"vault", "add", testpath/"hello.txt"
-    assert_match "hello.txt", shell_output("#{bin}/vault list")
-    system bin/"vault", "get", "hello.txt", "-o", testpath/"out.txt"
-    assert_equal "hello", (testpath/"out.txt").read
-  end
-end
diff --git a/README.md b/README.md
index 07bc6c6..bfe596c 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@ Homebrew tap.
 
 ```sh
 brew install andydixon/tap/mapsize
-brew install andydixon/tap/vault     # post-quantum file vault
 brew install andydixon/tap/swaptop   # Linux only
 brew install andydixon/tap/dockertop # Linux only
 ```