diff --git a/openapi.yaml b/openapi.yaml
index 87cbc17..9a66ad9 100644
--- a/openapi.yaml
+++ b/openapi.yaml
@@ -2601,7 +2601,8 @@ paths:
                     Random seed for reproducible training. When set, the same seed produces the same run (e.g. data shuffle, init). If omitted or null, the server applies its default seed (e.g. 42).
                 suffix:
                   type: string
-                  description: Suffix that will be added to your fine-tuned model name
+                  maxLength: 64
+                  description: Suffix that will be added to your fine-tuned model name. Must be at most 64 characters long.
                 wandb_api_key:
                   type: string
                   description: Integration key for tracking experiments and model metrics on W&B platform