diff --git a/cloudwatch-firehose-es/dev/test-event-multi-categories-data.json b/cloudwatch-firehose-es/dev/test-event-multi-categories-data.json
new file mode 100644
index 0000000..76ff7c5
--- /dev/null
+++ b/cloudwatch-firehose-es/dev/test-event-multi-categories-data.json
@@ -0,0 +1,31 @@
+{
+    "messageType": "DATA_MESSAGE",
+    "owner": "428739250234",
+    "logGroup": "/ecommerce/integration/application/app/www/web/v1",
+    "logStream": "application-app-www-web-v1/www/ad5d3991-e6b1-476b-90b7-13dec73f18fa",
+    "subscriptionFilters": [
+        "ecommerce-integration-soln-ecommerce-es-lsubscriptionXfirehosestreamXappXecommerceXpylogsXwebX0-1ECOURWQ2MW8Z"
+    ],
+    "logEvents": [
+        {
+            "id": "01",
+            "timestamp": 1556622091428,
+            "message": "{\"categories\":[\"INFO\", \"XXX\"],\"message\": \"Trying to process payment for order #61075 from 30-04-2019 with $retail=74.5, $discounted=73.625, $real=73.625, %discount=5 $discount=3.875\",\"time\": \"2019-04-30T11:01:31.428306\"}"
+        },
+        {
+            "id": "02",
+            "timestamp": 1556622091528,
+            "message": "{\"categories\":[\"INFO\"],\"message\": \"Trying to process payment for order #61077 from 30-04-2019 with $retail=75.5, $discounted=73.625, $real=73.625, %discount=5 $discount=3.875\",\"time\": \"2019-04-30T11:01:31.428306\"}"
+        },
+        {
+            "id": "03",
+            "timestamp": 1556622091528,
+            "message": "{\"categories\":[\"SIEM\"],\"message\": \"Trying to process payment for order #61077 from 30-04-2019 with $retail=76.5, $discounted=73.625, $real=73.625, %discount=5 $discount=3.875\",\"time\": \"2019-04-30T11:01:31.428306\"}"
+        },
+        {
+            "id": "04",
+            "timestamp": 1556622091528,
+            "message": "{\"categories\":[\"ERROR\"],\"message\": \"Trying to process payment for order #61077 from 30-04-2019 with $retail=77.5, $discounted=73.625, $real=73.625, %discount=5 $discount=3.875\",\"time\": \"2019-04-30T11:01:31.428306\"}"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/cloudwatch-firehose-es/dev/test-event-multi-categories.json b/cloudwatch-firehose-es/dev/test-event-multi-categories.json
new file mode 100644
index 0000000..b095f64
--- /dev/null
+++ b/cloudwatch-firehose-es/dev/test-event-multi-categories.json
@@ -0,0 +1,10 @@
+
+{
+    "deliveryStreamArn" : "arn:aws:firehose:us-east-1:123456789012:deliverystream/test-event-multi-categories",
+    "records" : [
+        {
+            "recordId" : "abc123",
+            "data" : "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"
+        }
+    ]
+}
diff --git a/cloudwatch-firehose-es/dev/test-event-data.json b/cloudwatch-firehose-es/dev/test-event-no-categories-data.json
similarity index 100%
rename from cloudwatch-firehose-es/dev/test-event-data.json
rename to cloudwatch-firehose-es/dev/test-event-no-categories-data.json
diff --git a/cloudwatch-firehose-es/dev/test-event.json b/cloudwatch-firehose-es/dev/test-event-no-categories.json
similarity index 100%
rename from cloudwatch-firehose-es/dev/test-event.json
rename to cloudwatch-firehose-es/dev/test-event-no-categories.json
diff --git a/cloudwatch-firehose-es/src/run.py b/cloudwatch-firehose-es/src/run.py
index 6fbf84d..7dc77b8 100644
--- a/cloudwatch-firehose-es/src/run.py
+++ b/cloudwatch-firehose-es/src/run.py
@@ -160,16 +160,16 @@ def processRecords(records):
                                     }
 
                                 else:
-                                    reingest_event = data
-                                    reingest_event['logEvents'] = [ event ]
-                                    reingest_event['metadata'] = { 'partitionKeys' : { 'category' : category } }
+                                    reingest_category_event = data.copy()
+                                    reingest_category_event['logEvents'] = [ event ]
+                                    reingest_category_event['metadata'] = { 'partitionKeys' : { 'category' : category } }
 
-                                    reingest_json = json.dumps(reingest_event)
-                                    reingest_bytes = reingest_json.encode('utf-8')
-                                    reingest_compress = gzip.compress(reingest_bytes)
+                                    reingest_category_json = json.dumps(reingest_category_event)
+                                    reingest_category_bytes = reingest_category_json.encode('utf-8')
+                                    reingest_category_compress = gzip.compress(reingest_category_bytes)
 
                                     yield {
-                                        'data' : str( base64.b64encode( reingest_compress ), 'utf-8'),
+                                        'data' : str( base64.b64encode( reingest_category_compress ), 'utf-8'),
                                         'result' : 'Reingest',
                                         'recordId' : recId
                                     }
@@ -185,7 +185,7 @@ def processRecords(records):
 
                 else:
 
-                    reingest_event = data
+                    reingest_event = data.copy()
                     reingest_event['logEvents'] = [ event ]
 
                     reingest_json = json.dumps(reingest_event)