diff --git a/common/api-review/vertexai.api.md b/common/api-review/vertexai.api.md
index a3f7b30b994..041bc62451f 100644
--- a/common/api-review/vertexai.api.md
+++ b/common/api-review/vertexai.api.md
@@ -541,7 +541,7 @@ export interface SafetySetting {
     // (undocumented)
     category: HarmCategory;
     // (undocumented)
-    method: HarmBlockMethod;
+    method?: HarmBlockMethod;
     // (undocumented)
     threshold: HarmBlockThreshold;
 }
diff --git a/packages/vertexai/src/types/requests.ts b/packages/vertexai/src/types/requests.ts
index c844ddfb878..e86918a8ed8 100644
--- a/packages/vertexai/src/types/requests.ts
+++ b/packages/vertexai/src/types/requests.ts
@@ -63,7 +63,7 @@ export interface GenerateContentRequest extends BaseParams {
 export interface SafetySetting {
   category: HarmCategory;
   threshold: HarmBlockThreshold;
-  method: HarmBlockMethod;
+  method?: HarmBlockMethod;
 }
 
 /**