diff --git a/specs/common/schemas/IndexSettings.yml b/specs/common/schemas/IndexSettings.yml
index 1d180c43839..aaaab366f89 100644
--- a/specs/common/schemas/IndexSettings.yml
+++ b/specs/common/schemas/IndexSettings.yml
@@ -768,7 +768,6 @@ hitsPerPage:
     - Pagination
 
 userData:
-  type: object
   example:
     settingID: f2a7b51e3503acc6a39b3784ffb84300
     pluginVersion: 1.6.0
diff --git a/templates/kotlin/json_object_serializer.mustache b/templates/kotlin/json_object_serializer.mustache
index b7db4a98571..92a1cd7532b 100644
--- a/templates/kotlin/json_object_serializer.mustache
+++ b/templates/kotlin/json_object_serializer.mustache
@@ -2,7 +2,7 @@ internal object {{classname}}Serializer : KSerializer<{{classname}}> {
 
     override val descriptor: SerialDescriptor = buildClassSerialDescriptor("{{classname}}") {
         {{#vars}}
-        element<{{{datatypeWithEnum}}}>("{{{vendorExtensions.x-base-name-literal}}}"{{^required}}, isOptional = true{{/required}})
+        element<{{#isAnyType}}JsonElement{{/isAnyType}}{{^isAnyType}}{{{datatypeWithEnum}}}{{/isAnyType}}>("{{{vendorExtensions.x-base-name-literal}}}"{{^required}}, isOptional = true{{/required}})
         {{/vars}}
     }
 
diff --git a/tests/CTS/requests/search/setSettings.json b/tests/CTS/requests/search/setSettings.json
index f14b21c850d..3c2f3799a48 100644
--- a/tests/CTS/requests/search/setSettings.json
+++ b/tests/CTS/requests/search/setSettings.json
@@ -760,7 +760,15 @@
       "indexName": "theIndexName",
       "indexSettings": {
         "ranking": [
-          "desc(is_popular)", "typo", "geo", "words", "filters", "proximity", "attribute", "exact", "custom"
+          "desc(is_popular)",
+          "typo",
+          "geo",
+          "words",
+          "filters",
+          "proximity",
+          "attribute",
+          "exact",
+          "custom"
         ]
       }
     },
@@ -769,7 +777,15 @@
       "method": "PUT",
       "body": {
         "ranking": [
-          "desc(is_popular)", "typo", "geo", "words", "filters", "proximity", "attribute", "exact", "custom"
+          "desc(is_popular)",
+          "typo",
+          "geo",
+          "words",
+          "filters",
+          "proximity",
+          "attribute",
+          "exact",
+          "custom"
         ]
       }
     }