diff --git a/Gemfile.lock b/Gemfile.lock
index c0cc1c2..bcc4c4b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    test_data (0.3.2)
+    test_data (0.4.0)
       railties (>= 6.0, < 8.0)
 
 GEM
diff --git a/README.md b/README.md
index 55cf313..457760b 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,10 @@
+# ⛔ DEPRECATED ⛔
+
+test_data is deprecated and unmaintained.
+
+We have no plans to hand off the package or resurrect it, but you are of course
+welcome to fork it.
+
 # The `test_data` gem
 
 `test_data` does what it says on the tin: it provides a fast & reliable system
diff --git a/example/Gemfile.lock b/example/Gemfile.lock
index 44a7dce..52104d2 100644
--- a/example/Gemfile.lock
+++ b/example/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ..
   specs:
-    test_data (0.3.2)
+    test_data (0.4.0)
       railties (>= 6.0, < 8.0)
 
 GEM
diff --git a/lib/test_data/version.rb b/lib/test_data/version.rb
index 6380956..0ceccc1 100644
--- a/lib/test_data/version.rb
+++ b/lib/test_data/version.rb
@@ -1,3 +1,3 @@
 module TestData
-  VERSION = "0.3.2"
+  VERSION = "0.4.0"
 end
diff --git a/test_data.gemspec b/test_data.gemspec
index d282714..5c48f1b 100644
--- a/test_data.gemspec
+++ b/test_data.gemspec
@@ -7,6 +7,11 @@ Gem::Specification.new do |spec|
   spec.email = ["searls@gmail.com"]
 
   spec.summary = "Dumps and Loads data for your Rails app's tests"
+  spec.description = <<~DESCRIPTION
+    DEPRECATED: test_data is deprecated and unmaintained. We have no plans to hand off the package or resurrect it, but you are of course welcome to fork it.
+
+    Dumps and Loads data for your Rails app's tests
+  DESCRIPTION
   spec.homepage = "https://github.com/testdouble/test_data"
   spec.required_ruby_version = Gem::Requirement.new(">= 2.4.0")