diff --git a/.env.example b/.env.example
index 4eb4695e0..2d1be3373 100644
--- a/.env.example
+++ b/.env.example
@@ -189,7 +189,7 @@ SEARXNG_INSTANCE=http://localhost:8080
 # ODYSSEUS_EMAIL_COMPOSE_UPLOAD_MAX_BYTES=26214400       # email compose attachment (25 MB)
 # ODYSSEUS_STT_MAX_AUDIO_BYTES=26214400                  # speech-to-text audio (25 MB)
 # ODYSSEUS_ICS_MAX_BYTES=10485760                        # calendar .ics import (10 MB)
-# ODYSSEUS_TTS_CACHE_MAX_BYTES=52428800                  # TTS cache (500 MB)
+# ODYSSEUS_TTS_CACHE_MAX_BYTES=524288000                 # TTS cache (500 MB)
 
 # ============================================================
 # Host Docker access (explicit opt-in)