Bazel rules_rust 0.4.0
diff --git a/WORKSPACE b/WORKSPACE
index a0773b8..6226610 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -4,12 +4,8 @@
 
 http_archive(
     name = "rules_rust",
-    sha256 = "617082067629939c0a22f587811a3e822a50a203119a90380e21f5aec3373da9",
-    strip_prefix = "rules_rust-e07881fa22a5f0d16230d8b23bbff2bf358823b8",
-    urls = [
-        # Main branch as of 2022-04-27
-        "https://github.com/bazelbuild/rules_rust/archive/e07881fa22a5f0d16230d8b23bbff2bf358823b8.tar.gz",
-    ],
+    sha256 = "edb87c0d2ba70823fe3df7862676d695599314a4634b9758bd55f0e8f19c2751",
+    urls = ["https://github.com/bazelbuild/rules_rust/releases/download/0.4.0/rules_rust-v0.4.0.tar.gz"],
 )
 
 load("@rules_rust//rust:repositories.bzl", "rules_rust_dependencies", "rust_register_toolchains")