CHANGELOG.md in grape-rabl-0.3.1 vs CHANGELOG.md in grape-rabl-0.4.0

@@ -1,4 +1,8 @@
+#### v0.4.0
+
+* Make grape-rabl thread-safe. [#37](https://github.com/LTe/grape-rabl/issues/37) [@kushkella](https://github.com/kushkella)
+
 #### v0.3.1
 
 * The `render` method will no longer modify endpoint options at runtime. [#35](https://github.com/LTe/grape-rabl/issues/35) [@yesmeck](https://github.com/yesmeck)
 
 #### v0.3.0