diff --git a/servers/stalwart/config.toml b/servers/stalwart/config.toml
index 57bf015d..4dd7dcaf 100644
--- a/servers/stalwart/config.toml
+++ b/servers/stalwart/config.toml
@@ -87,3 +87,4 @@ secret-key = "dff812b5027eef16d57f2ff6865e3f4235663d88aaf3cf066348ca6f1841099c"
 endpoint = "https://ad1e593a824b98c89c76cade5db18036.r2.cloudflarestorage.com"
 timeout = "30s"
 key-prefix = "stalwart/"
+compression = "lz4"