diff --git a/configs/train_decoder_config.example.json b/configs/train_decoder_config.example.json
index f08758e..d618579 100644
--- a/configs/train_decoder_config.example.json
+++ b/configs/train_decoder_config.example.json
@@ -15,7 +15,7 @@
         "channels": 3,
         "timesteps": 1000,
         "loss_type": "l2",
-        "beta_schedule": "cosine",
+        "beta_schedule": ["cosine"],
         "learned_variance": true
     },
     "data": {