diff --git a/generated_types.json b/generated_types.json
index 4808f9ed..8f63b28b 100644
--- a/generated_types.json
+++ b/generated_types.json
@@ -2150,7 +2150,12 @@
               "object",
               "null"
             ],
-            "additionalProperties": {},
+            "additionalProperties": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
             "description": "Facets for categorization (dictionary from facet id to value)"
           },
           "classifications": {
@@ -2778,7 +2783,12 @@
               "object",
               "null"
             ],
-            "additionalProperties": {},
+            "additionalProperties": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
             "description": "Facets for categorization (dictionary from facet id to value)"
           },
           "classifications": {
@@ -5783,7 +5793,12 @@
               "object",
               "null"
             ],
-            "additionalProperties": {},
+            "additionalProperties": {
+              "type": [
+                "string",
+                "null"
+              ]
+            },
             "description": "Facets for categorization (dictionary from facet id to value)"
           },
           "classifications": {
diff --git a/py/src/braintrust/generated_types.py b/py/src/braintrust/generated_types.py
index 0ad0d88b..d49b2054 100644
--- a/py/src/braintrust/generated_types.py
+++ b/py/src/braintrust/generated_types.py
@@ -1,4 +1,4 @@
-"""Auto-generated file (content hash 4767a23fab45ae89) -- do not modify"""
+"""Auto-generated file (content hash 70ebf7ccf0df48b3) -- do not modify"""
 
 from ._generated_types import (
     Acl,