diff --git a/src/V1beta1/Client/ErrorGroupServiceClient.php b/src/V1beta1/Client/ErrorGroupServiceClient.php
index 0f12397..82b8339 100644
--- a/src/V1beta1/Client/ErrorGroupServiceClient.php
+++ b/src/V1beta1/Client/ErrorGroupServiceClient.php
@@ -52,8 +52,8 @@
  *
  * @experimental
  *
- * @method PromiseInterface getGroupAsync(GetGroupRequest $request, array $optionalArgs = [])
- * @method PromiseInterface updateGroupAsync(UpdateGroupRequest $request, array $optionalArgs = [])
+ * @method PromiseInterface<ErrorGroup> getGroupAsync(GetGroupRequest $request, array $optionalArgs = [])
+ * @method PromiseInterface<ErrorGroup> updateGroupAsync(UpdateGroupRequest $request, array $optionalArgs = [])
  */
 final class ErrorGroupServiceClient
 {
diff --git a/src/V1beta1/Client/ErrorStatsServiceClient.php b/src/V1beta1/Client/ErrorStatsServiceClient.php
index 58b77c5..9b62123 100644
--- a/src/V1beta1/Client/ErrorStatsServiceClient.php
+++ b/src/V1beta1/Client/ErrorStatsServiceClient.php
@@ -55,9 +55,9 @@
  *
  * @experimental
  *
- * @method PromiseInterface deleteEventsAsync(DeleteEventsRequest $request, array $optionalArgs = [])
- * @method PromiseInterface listEventsAsync(ListEventsRequest $request, array $optionalArgs = [])
- * @method PromiseInterface listGroupStatsAsync(ListGroupStatsRequest $request, array $optionalArgs = [])
+ * @method PromiseInterface<DeleteEventsResponse> deleteEventsAsync(DeleteEventsRequest $request, array $optionalArgs = [])
+ * @method PromiseInterface<PagedListResponse> listEventsAsync(ListEventsRequest $request, array $optionalArgs = [])
+ * @method PromiseInterface<PagedListResponse> listGroupStatsAsync(ListGroupStatsRequest $request, array $optionalArgs = [])
  */
 final class ErrorStatsServiceClient
 {
diff --git a/src/V1beta1/Client/ReportErrorsServiceClient.php b/src/V1beta1/Client/ReportErrorsServiceClient.php
index 2415de6..c9177e5 100644
--- a/src/V1beta1/Client/ReportErrorsServiceClient.php
+++ b/src/V1beta1/Client/ReportErrorsServiceClient.php
@@ -51,7 +51,7 @@
  *
  * @experimental
  *
- * @method PromiseInterface reportErrorEventAsync(ReportErrorEventRequest $request, array $optionalArgs = [])
+ * @method PromiseInterface<ReportErrorEventResponse> reportErrorEventAsync(ReportErrorEventRequest $request, array $optionalArgs = [])
  */
 final class ReportErrorsServiceClient
 {