diff --git a/api/chalicelib/core/sourcemaps_parser.py b/api/chalicelib/core/sourcemaps_parser.py
index b7c17f3d3..d6e7414ba 100644
--- a/api/chalicelib/core/sourcemaps_parser.py
+++ b/api/chalicelib/core/sourcemaps_parser.py
@@ -8,7 +8,11 @@ def get_original_trace(key, positions):
         "key": key,
         "positions": positions,
         "padding": 5,
-        "bucket": environ['sourcemaps_bucket']
+        "bucket": environ['sourcemaps_bucket'],
+        "S3_HOST": environ['S3_HOST'],
+        "S3_KEY": environ['S3_KEY'],
+        "S3_SECRET": environ['S3_SECRET'],
+        "region": environ['sessions_region']
     }
     r = requests.post(environ["sourcemaps_reader"], json=payload)
     if r.status_code != 200:
diff --git a/utilities/servers/sourcemaps-handler.js b/utilities/servers/sourcemaps-handler.js
index 98c2186dc..fca74758b 100644
--- a/utilities/servers/sourcemaps-handler.js
+++ b/utilities/servers/sourcemaps-handler.js
@@ -10,7 +10,16 @@ module.exports.sourcemapReader = async event => {
         "lib/mappings.wasm": `https://unpkg.com/source-map@${getVersion(sourceMapVersion)}/lib/mappings.wasm`
     });
     let s3;
-    if (process.env.S3_HOST) {
+    if (event.S3_HOST) {
+        s3 = new AWS.S3({
+            endpoint: event.S3_HOST,
+            accessKeyId: event.S3_KEY,
+            secretAccessKey: event.S3_SECRET,
+            region: event.region,
+            s3ForcePathStyle: true, // needed with minio?
+            signatureVersion: 'v4'
+        });
+    } else if (process.env.S3_HOST) {
         s3 = new AWS.S3({
             endpoint: process.env.S3_HOST,
             accessKeyId: process.env.S3_KEY,