diff --git a/scripts/module.js b/scripts/module.js
index a5eb52d..3c96f44 100644
--- a/scripts/module.js
+++ b/scripts/module.js
@@ -156,6 +156,12 @@ class S3Utils {
             game.data.files.s3.endpoint.protocol + 
             "//" + 
             game.data.files.s3.endpoint.hostname + 
+            ((game.data.files.s3.endpoint.port === 80) ? "" : ((game.data.files.s3.endpoint.port === 443) ? "" : ":" + game.data.files.s3.endpoint.port)) +
+                /* Add port number only if endpoint port isn't 80 or 443.
+                   Tested & verified to work on an endpoint port that ISN'T 80 or 443,
+                   but unsure how this logic holds up if given an endpoint URI without port.
+                   Also unsure if AWS SDK assumes the port in the endpoint object based on protocol.
+                   TL;DR Needs testing. */
             "/" +
             bucket +
             "/" +
@@ -183,4 +189,4 @@ let S3Utilss = {
     createS3URL: S3Utils.createS3URL
 }
 
-window.S3Utils = S3Utilss;
\ No newline at end of file
+window.S3Utils = S3Utilss;