CHANGELOG.md in rails_multitenant-0.5.1 vs CHANGELOG.md in rails_multitenant-0.5.2

@@ -1,6 +1,10 @@
 # Changelog
 
+### 0.5.2
+* Optimize `CurrentInstance.current` / `CurrentInstance.current_id` / `CurrentInstance.current=` 
+  / `CurrentInstance.current_id=`.
+
 ### 0.5.1
 * Fix incorrect Rails version dependency in rubygems.org.
 
 ### 0.5.0
 * Add `required` option to `multitenant_on` and `multitenant_on_model`.