diff --git a/openapi/openapiv2.json b/openapi/openapiv2.json
index 343c9f702..d5c1f8632 100644
--- a/openapi/openapiv2.json
+++ b/openapi/openapiv2.json
@@ -12203,6 +12203,10 @@
         "activityPaused": {
           "type": "boolean",
           "description": "Will be set to true if the activity is paused."
+        },
+        "activityReset": {
+          "type": "boolean",
+          "description": "Will be set to true if the activity was reset.\nApplies only to the current run."
         }
       }
     },
@@ -12216,6 +12220,10 @@
         "activityPaused": {
           "type": "boolean",
           "description": "Will be set to true if the activity is paused."
+        },
+        "activityReset": {
+          "type": "boolean",
+          "description": "Will be set to true if the activity was reset.\nApplies only to the current run."
         }
       }
     },
diff --git a/openapi/openapiv3.yaml b/openapi/openapiv3.yaml
index cc5a7315f..0d3d43614 100644
--- a/openapi/openapiv3.yaml
+++ b/openapi/openapiv3.yaml
@@ -9254,6 +9254,11 @@ components:
         activityPaused:
           type: boolean
           description: Will be set to true if the activity is paused.
+        activityReset:
+          type: boolean
+          description: |-
+            Will be set to true if the activity was reset.
+             Applies only to the current run.
     RecordActivityTaskHeartbeatRequest:
       type: object
       properties:
@@ -9281,6 +9286,11 @@ components:
         activityPaused:
           type: boolean
           description: Will be set to true if the activity is paused.
+        activityReset:
+          type: boolean
+          description: |-
+            Will be set to true if the activity was reset.
+             Applies only to the current run.
     RegisterNamespaceRequest:
       type: object
       properties:
diff --git a/temporal/api/workflowservice/v1/request_response.proto b/temporal/api/workflowservice/v1/request_response.proto
index 011c192cd..4f1d09adc 100644
--- a/temporal/api/workflowservice/v1/request_response.proto
+++ b/temporal/api/workflowservice/v1/request_response.proto
@@ -529,6 +529,10 @@ message RecordActivityTaskHeartbeatResponse {
 
     // Will be set to true if the activity is paused.
     bool activity_paused = 2;
+
+    // Will be set to true if the activity was reset.
+    // Applies only to the current run.
+    bool activity_reset = 3;
 }
 
 message RecordActivityTaskHeartbeatByIdRequest {
@@ -553,6 +557,10 @@ message RecordActivityTaskHeartbeatByIdResponse {
 
     // Will be set to true if the activity is paused.
     bool activity_paused = 2;
+
+    // Will be set to true if the activity was reset.
+    // Applies only to the current run.
+    bool activity_reset = 3;
 }
 
 message RespondActivityTaskCompletedRequest {
@@ -1840,13 +1848,13 @@ message UpdateActivityOptionsRequest {
     // Controls which fields from `activity_options` will be applied
     google.protobuf.FieldMask update_mask = 5;
 
-    // either activity id or activity type must be provided
-    oneof activity {
-        // Only activity with this ID will be updated.
-        string id = 6;
-        // Update all running activities of this type.
-        string type = 7;
-    }
+        // either activity id or activity type must be provided
+        oneof activity {
+            // Only activity with this ID will be updated.
+            string id = 6;
+            // Update all running activities of this type.
+            string type = 7;
+        }
 }
 
 message UpdateActivityOptionsResponse {