diff --git a/CHANGELOG.md b/CHANGELOG.md
index effa387..e51ee48 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.12.1
+
+* Paul Hinze fixed a stray stderr output on machines with GNU which.
+
 ## 4.12.0
 
 * Ray Brown added support for the Bun package manager.
diff --git a/mjml-rails-4.12.0.gem b/archive/mjml-rails-4.12.0.gem
similarity index 100%
rename from mjml-rails-4.12.0.gem
rename to archive/mjml-rails-4.12.0.gem
diff --git a/mjml-rails-4.12.0.gem.sha512 b/archive/mjml-rails-4.12.0.gem.sha512
similarity index 100%
rename from mjml-rails-4.12.0.gem.sha512
rename to archive/mjml-rails-4.12.0.gem.sha512
diff --git a/lib/mjml/version.rb b/lib/mjml/version.rb
index 80f839c..3232284 100644
--- a/lib/mjml/version.rb
+++ b/lib/mjml/version.rb
@@ -2,5 +2,5 @@
 
 module Mjml
   # Version number no longer matches MJML.io version
-  VERSION = '4.12.0'
+  VERSION = '4.12.1'
 end
diff --git a/mjml-rails-4.12.1.gem b/mjml-rails-4.12.1.gem
new file mode 100644
index 0000000..17acf6d
Binary files /dev/null and b/mjml-rails-4.12.1.gem differ
diff --git a/mjml-rails-4.12.1.gem.sha512 b/mjml-rails-4.12.1.gem.sha512
new file mode 100644
index 0000000..8d6d459
--- /dev/null
+++ b/mjml-rails-4.12.1.gem.sha512
@@ -0,0 +1 @@
+bb4b91615954a7a035feea8ee32f3b09e4469a7d53b92b6d9df2c84c2057c21478bde35d5fa62784adc6de179b40c4bbc6cd7cbfb48a7c5e3a3bd8bda71b865a
\ No newline at end of file