diff --git a/README.md b/README.md
index 7b33ebe..9507904 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,13 @@ Note: CouchRest::ExtendedDocument only supports CouchDB 0.10.0 or newer.
 
     end
 
+### Notable Issues
+
+ExtendedDocument uses active_support for some of its internals. Ensure you have a stable active support gem installed 
+or at least 3.0.0.beta4.
+
+JSON gem versions 1.4.X are kown to cause problems with stack overflows and general badness. Version 1.2.4 appears to work fine.
+
 ### Ruby on Rails
 
 CouchRest::ExtendedDocument is compatible with rails and provides some ActiveRecord-like methods.
diff --git a/Rakefile b/Rakefile
index 8fe61d2..c296968 100644
--- a/Rakefile
+++ b/Rakefile
@@ -26,7 +26,7 @@ begin
     gemspec.has_rdoc = true
     gemspec.add_dependency("couchrest", ">= 1.0.0.beta")
     gemspec.add_dependency("mime-types", ">= 1.15")
-    gemspec.add_dependency("activesupport", ">= 2.3.0")
+    gemspec.add_dependency("activesupport", ">= 2.3.5")
     gemspec.version = CouchRest::ExtendedDocument::VERSION
     gemspec.date = "2008-11-22"
     gemspec.require_path = "lib"