diff --git a/mint/preinstall.sh b/mint/preinstall.sh
index c73df6d8f..4ac2de495 100755
--- a/mint/preinstall.sh
+++ b/mint/preinstall.sh
@@ -19,7 +19,7 @@ export APT="apt --quiet --yes"
 export WGET="wget --quiet --no-check-certificate"
 
 # install nodejs source list
-if ! $WGET --output-document=- https://deb.nodesource.com/setup_13.x | bash -; then
+if ! $WGET --output-document=- https://deb.nodesource.com/setup_14.x | bash -; then
     echo "unable to set nodejs repository"
     exit 1
 fi
diff --git a/mint/run/core/s3select/csv.py b/mint/run/core/s3select/csv.py
index b34ba2afc..298415484 100644
--- a/mint/run/core/s3select/csv.py
+++ b/mint/run/core/s3select/csv.py
@@ -20,7 +20,7 @@ import os
 
 from minio import Minio
 from minio.select.options import (CSVInput, CSVOutput, InputSerialization,
-                                  JsonOutput, OutputSerialization,
+                                  JSONOutput, OutputSerialization,
                                   RequestProgress, SelectObjectOptions)
 
 from utils import *
@@ -107,7 +107,7 @@ def test_csv_input_custom_quote_char(client, log_output):
                                  AllowQuotedRecordDelimiter="FALSE",),
                 ),
                 output_serialization=OutputSerialization(
-                    json=JsonOutput(
+                    json=JSONOutput(
                         RecordDelimiter="\n",
                     )
                 ),
diff --git a/mint/run/core/s3select/sql_ops.py b/mint/run/core/s3select/sql_ops.py
index bf3c0bd84..8b2099a21 100644
--- a/mint/run/core/s3select/sql_ops.py
+++ b/mint/run/core/s3select/sql_ops.py
@@ -19,7 +19,7 @@ import io
 from datetime import datetime
 
 from minio.select.options import (CSVInput, CSVOutput, InputSerialization,
-                                  JSONInput, OutputSerialization,
+                                  JSONInput, JSONOutput, OutputSerialization,
                                   RequestProgress, SelectObjectOptions)
 
 from utils import generate_bucket_name, generate_object_name
@@ -394,7 +394,7 @@ def test_sql_select_json(client, log_output):
     ]
 
     input_serialization = InputSerialization(json=JSONInput(Type="DOCUMENT"))
-    output_serialization = OutputSerialization(json=JsonOutput())
+    output_serialization = OutputSerialization(json=JSONOutput())
     try:
         test_sql_expressions_custom_input_output(client, json_testcontent,
                                                  input_serialization, output_serialization, tests, log_output)