diff --git a/Formula/sass.rb b/Formula/sass.rb
index ca69436..910336f 100644
--- a/Formula/sass.rb
+++ b/Formula/sass.rb
@@ -16,7 +16,9 @@ class Sass < Formula
   depends_on "dart-lang/dart/dart" => :build
 
   resource "language" do
-    url "https://github.com/sass/sass.git", revision: "c04dbf6c447caf9d62094597e68fe5bf5d0b4025"
+    url "https://github.com/sass/sass.git",
+      revision: "c04dbf6c447caf9d62094597e68fe5bf5d0b4025",
+      branch: "main" # Only needed to silence a validation
   end
 
   def install