diff --git a/Formula/s/service-weaver.rb b/Formula/s/service-weaver.rb
index f317152cd8eaf..b4da10f64e6ef 100644
--- a/Formula/s/service-weaver.rb
+++ b/Formula/s/service-weaver.rb
@@ -40,6 +40,9 @@ class ServiceWeaver < Formula
     end
   end
 
+  # upstream announcement, https://github.com/ServiceWeaver/weaver/pull/804
+  deprecate! date: "2025-06-14", because: :unmaintained
+
   depends_on "go" => :build
 
   conflicts_with "weaver", because: "both install a `weaver` binary"