diff --git a/docs/reference.asciidoc b/docs/reference.asciidoc
index d72ffb5fa..e3870283c 100644
--- a/docs/reference.asciidoc
+++ b/docs/reference.asciidoc
@@ -9094,7 +9094,7 @@ client.synonyms.putSynonymRule({ set_id, rule_id, synonyms })
 * *Request (object):*
 ** *`set_id` (string)*: The id of the synonym set to be updated with the synonym rule
 ** *`rule_id` (string)*: The id of the synonym rule to be updated or created
-** *`synonyms` (string[])*
+** *`synonyms` (string)*
 
 [discrete]
 === tasks
diff --git a/src/api/types.ts b/src/api/types.ts
index 90ce3473e..7a707fd97 100644
--- a/src/api/types.ts
+++ b/src/api/types.ts
@@ -17278,7 +17278,7 @@ export interface SynonymsPutSynonymResponse {
 export interface SynonymsPutSynonymRuleRequest extends RequestBase {
   set_id: Id
   rule_id: Id
-  synonyms: SynonymsSynonymString[]
+  synonyms: SynonymsSynonymString
 }
 
 export type SynonymsPutSynonymRuleResponse = SynonymsSynonymsUpdateResult
diff --git a/src/api/typesWithBodyKey.ts b/src/api/typesWithBodyKey.ts
index b41622899..dc9617cbd 100644
--- a/src/api/typesWithBodyKey.ts
+++ b/src/api/typesWithBodyKey.ts
@@ -17693,7 +17693,7 @@ export interface SynonymsPutSynonymRuleRequest extends RequestBase {
   rule_id: Id
   /** @deprecated The use of the 'body' key has been deprecated, move the nested keys to the top level object. */
   body?: {
-    synonyms: SynonymsSynonymString[]
+    synonyms: SynonymsSynonymString
   }
 }