diff --git a/config.json b/config.json
index f70148d..9d06e5e 100644
--- a/config.json
+++ b/config.json
@@ -69,7 +69,7 @@
   "use_cache": true,
   "vocab_size": 50257,
   "window_size": 256,
-  "tokenizer_class": "GPT2Tokenizer"
+  "tokenizer_class": "GPT2Tokenizer",
   "task_specific_params": {
     "text-generation": {
       "do_sample": true,