diff --git a/WORKSPACE b/WORKSPACE
index 96c538e753ee..a2d700442d79 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -6,10 +6,10 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
     name = "buildifier_prebuilt",
-    sha256 = "72b5bb0853aac597cce6482ee6c62513318e7f2c0050bc7c319d75d03d8a3875",
-    strip_prefix = "buildifier-prebuilt-6.3.3",
+    sha256 = "8ada9d88e51ebf5a1fdff37d75ed41d51f5e677cdbeafb0a22dda54747d6e07e",
+    strip_prefix = "buildifier-prebuilt-6.4.0",
     urls = [
-        "https://github.com/keith/buildifier-prebuilt/archive/6.3.3.tar.gz",
+        "https://github.com/keith/buildifier-prebuilt/archive/6.4.0.tar.gz",
     ],
 )