diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8746b37..840e2f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.5.2 [unreleased]
+## 2.5.2
 
 - Added `dates` option to return dates for day, week, month, quarter, and year
 
diff --git a/README.md b/README.md
index 6914e85..e7d8e3b 100644
--- a/README.md
+++ b/README.md
@@ -136,7 +136,24 @@ or
 User.group_by_day(:created_at).order("day desc").count
 ```
 
-### Format
+### Keys
+
+To get keys as date objects instead of time objects, use:
+
+```ruby
+User.group_by_day(:created_at, dates: true).count
+# {
+#   2013-03-10 => 70,
+#   2013-03-17 => 54,
+#   2013-03-24 => 80
+# }
+```
+
+or make this the default with:
+
+```ruby
+Groupdate.dates = true
+```
 
 To get keys in a different format, use:
 
diff --git a/lib/groupdate/version.rb b/lib/groupdate/version.rb
index f9b59a1..3054d4d 100644
--- a/lib/groupdate/version.rb
+++ b/lib/groupdate/version.rb
@@ -1,3 +1,3 @@
 module Groupdate
-  VERSION = "2.5.1"
+  VERSION = "2.5.2"
 end
--
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