diff --git a/src/custom/backend.ts b/src/custom/backend.ts
index bed7ebd..28edba2 100644
--- a/src/custom/backend.ts
+++ b/src/custom/backend.ts
@@ -40,10 +40,9 @@ const region =
     process.env.RUNS_ON_AWS_REGION ||
     process.env.AWS_REGION ||
     process.env.AWS_DEFAULT_REGION;
-const forcePathStyle = Boolean(
-    process.env.RUNS_ON_S3_FORCE_PATH_STYLE ||
-    process.env.AWS_S3_FORCE_PATH_STYLE
-);
+const forcePathStyle =
+    process.env.RUNS_ON_S3_FORCE_PATH_STYLE === "true" ||
+    process.env.AWS_S3_FORCE_PATH_STYLE === "true";
 
 const uploadQueueSize = Number(process.env.UPLOAD_QUEUE_SIZE || "4");
 const uploadPartSize =