diff --git a/api/.chalice/config.json b/api/.chalice/config.json
index 1b0560766..3b2960416 100644
--- a/api/.chalice/config.json
+++ b/api/.chalice/config.json
@@ -31,7 +31,7 @@
         "sessions_bucket": "mobs",
         "sessions_region": "us-east-1",
         "put_S3_TTL": "20",
-        "sourcemaps_reader": "http://127.0.0.1:3000/staging",
+        "sourcemaps_reader": "http://127.0.0.1:3000/",
         "sourcemaps_bucket": "sourcemaps",
         "sourcemaps_bucket_key": "",
         "sourcemaps_bucket_secret": "",
diff --git a/api/chalicelib/utils/s3.py b/api/chalicelib/utils/s3.py
index 06e308d38..49b6cfc85 100644
--- a/api/chalicelib/utils/s3.py
+++ b/api/chalicelib/utils/s3.py
@@ -2,11 +2,10 @@ from botocore.exceptions import ClientError
 from chalicelib.utils.helper import environ
 
 import boto3
-
+import botocore
 from botocore.client import Config
 
-# client = boto3.client('s3', endpoint_url=environ["S3_HOST"],
-client = boto3.client('s3', endpoint_url="http://minio.db.svc.cluster.local:9000",
+client = boto3.client('s3', endpoint_url=environ["S3_HOST"],
                       aws_access_key_id=environ["S3_KEY"],
                       aws_secret_access_key=environ["S3_SECRET"],
                       config=Config(signature_version='s3v4'),
@@ -14,14 +13,20 @@ client = boto3.client('s3', endpoint_url="http://minio.db.svc.cluster.local:9000
 
 
 def exists(bucket, key):
-    response = client.list_objects_v2(
-        Bucket=bucket,
-        Prefix=key,
-    )
-    for obj in response.get('Contents', []):
-        if obj['Key'] == key:
-            return True
-    return False
+    try:
+        boto3.resource('s3', endpoint_url=environ["S3_HOST"],
+                       aws_access_key_id=environ["S3_KEY"],
+                       aws_secret_access_key=environ["S3_SECRET"],
+                       config=Config(signature_version='s3v4'),
+                       region_name='us-east-1') \
+            .Object(bucket, key).load()
+    except botocore.exceptions.ClientError as e:
+        if e.response['Error']['Code'] == "404":
+            return False
+        else:
+            # Something else has gone wrong.
+            raise
+    return True
 
 
 def get_presigned_url_for_sharing(bucket, expires_in, key, check_exists=False):