diff --git a/docs/openapi.json b/docs/openapi.json
index c5612750..0b5b3ae3 100644
--- a/docs/openapi.json
+++ b/docs/openapi.json
@@ -877,7 +877,8 @@
           "logprobs": {
             "type": "boolean",
             "description": "Whether to return log probabilities of the output tokens or not. If true, returns the log probabilities of each\noutput token returned in the content of message.",
-            "example": "false"
+            "example": "false",
+            "nullable": true
           },
           "max_tokens": {
             "type": "integer",