CHANGELOG.md in api_client-0.5.11 vs CHANGELOG.md in api_client-0.5.12

- old
+ new

@@ -1,4 +1,8 @@
+# 0.5.12
+
+ * fix threading problem on ruby 1.8.7 and earlier
+
 # 0.5.11
 
  * fix handling errors
 
 # 0.5.10