diff --git a/middleman-core/middleman-core.gemspec b/middleman-core/middleman-core.gemspec
index c31e20b7..d9ef7045 100644
--- a/middleman-core/middleman-core.gemspec
+++ b/middleman-core/middleman-core.gemspec
@@ -36,4 +36,6 @@ Gem::Specification.new do |s|
 
   # i18n
   s.add_dependency("i18n", ["~> 0.6.1"])
+
+  s.post_install_message = "NOTICE: Middleman v3.2.x and greater no longer support Ruby 1.8"
 end