diff --git a/doc_source/json.md b/doc_source/json.md
index 593596b..c256475 100644
--- a/doc_source/json.md
+++ b/doc_source/json.md
@@ -72,7 +72,7 @@ Optional\. When set to `TRUE`, lets you skip malformed JSON syntax\. The default
 Optional\. The default is `FALSE`\. When set to `TRUE`, allows the SerDe to replace the dots in key names with underscores\. For example, if the JSON dataset contains a key with the name `"a.b"`, you can use this property to define the column name to be `"a_b"` in Athena\. By default \(without this SerDe\), Athena does not allow dots in column names\.
 
 **case\.insensitive**  
-Optional\. By default, Athena requires that all keys in your JSON dataset use lowercase\. The default is `TRUE`\. When set to `TRUE`, the SerDe converts all uppercase columns to lowercase\. Using `WITH SERDEPROPERTIES ("case.insensitive"= FALSE;)` allows you to use case\-sensitive key names in your data\.
+Optional\. The default is `TRUE`\. When set to `TRUE`, the SerDe converts all uppercase keys to lowercase\. Using `WITH SERDEPROPERTIES ("case.insensitive" = "FALSE")` allows you to use case\-sensitive key names in your data\. For every key that is not already all\-lowercase, you must also provide a mapping from the column name to the property name, e\.\g. `WITH SERDEPROPERTIES ("case.insensitive" = "FALSE", "mapping.userid" = "userId")`\. If you have two keys that are the same when lower cased, you can use this property to map them to different names, e\.g\. `WITH SERDEPROPERTIES ("case.insensitive" = "FALSE", "mapping.url1" = "URL", "mapping.url2" = "Url")`\.
 
 **ColumnToJsonKeyMappings**  
 Optional\. Maps column names to JSON keys that aren't identical to the column names\. This is useful when the JSON data contains keys that are [keywords](reserved-words.md)\. For example, if you have a JSON key named `timestamp`, set this parameter to `{"ts": "timestamp"}` to map this key to a column named `ts`\. This parameter takes values of type string\. It uses the following key pattern: `^\S+$` and the following value pattern: `^(?!\s*$).+`
@@ -170,4 +170,4 @@ CREATE external TABLE complex_json (
    )
 ROW FORMAT SERDE 'org.openx.data.jsonserde.JsonSerDe'
 LOCATION 's3://mybucket/myjsondata/';
-```
\ No newline at end of file
+```