diff --git a/app/matrix/lib/media-repo.libsonnet b/app/matrix/lib/media-repo.libsonnet
index 90af77b..286ffa7 100644
--- a/app/matrix/lib/media-repo.libsonnet
+++ b/app/matrix/lib/media-repo.libsonnet
@@ -31,12 +31,16 @@
         repo: {
             bindAddress: "0.0.0.0",
             port: 8000,
+            useForwardedHost: false,
         },
         database: {
             postgres: "postgres://%s:%s@%s/%s?sslmode=disable" % [cfg.db.username, cfg.db.password, cfg.db.host, cfg.db.database],
         },
         homeservers: cfg.homeservers,
         admins: cfg.admins,
+        thumbnails: {
+            maxSourceBytes: 10485760 * 3,
+        },
         datastores: [
             {
                 type: "s3",