diff --git a/README.md b/README.md
index 343fb38..8db75eb 100644
--- a/README.md
+++ b/README.md
@@ -12,11 +12,11 @@ This software is governed by the Apache 2.0 license.
 
 typically, to use you'd run:
 
-    node dynamoDBtoCSV.js -t Hourly_ZEDO_Impressions_by_IP > output.csv
+    node dynamoDBtoCSV.js -v "{}" -t Hourly_ZEDO_Impressions_by_IP > output.csv
 
 or even:
 
-    node dynamoDBtoCSV.js -t Hourly_ZEDO_Impressions_by_IP -f output.csv
+    node dynamoDBtoCSV.js -v "{}" -t Hourly_ZEDO_Impressions_by_IP -f output.csv
 
 to export to CSV
 
diff --git a/dynamoDBtoCSV.js b/dynamoDBtoCSV.js
index 38ef6d0..ada01a7 100644
--- a/dynamoDBtoCSV.js
+++ b/dynamoDBtoCSV.js
@@ -217,8 +217,14 @@ const unparseData = (lastEvaluatedKey) => {
   });
   if (writeCount > 0) {
     // remove column names after first write chunk.
-    endData = endData.replace(/(.*\r\n)/, "");;
+    endData = endData.replace(/(.*\r\n)/, "");
   }
+
+  // ensure each chunk ends with a newline so next chunk doesn't glue to it
+  if (!endData.endsWith("\n")) {
+    endData += "\n";
+  }
+
   if (program.file) {
     writeData(endData);
   } else {
diff --git a/package.json b/package.json
index 85d3e7d..954ca6d 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
   },
   "dependencies": {
     "aws-sdk": ">=2.0.0-rc13",
-    "commander": ">=2.2.0",
+    "commander": "6.*",
     "dynamodb-marshaler": "^2.0.0",
     "papaparse": "^5.3.0"
   }