diff --git a/apify-api/openapi/components/schemas/actors/UpdateActorRequest.yaml b/apify-api/openapi/components/schemas/actors/UpdateActorRequest.yaml
index 67fe295422..46a67727f2 100644
--- a/apify-api/openapi/components/schemas/actors/UpdateActorRequest.yaml
+++ b/apify-api/openapi/components/schemas/actors/UpdateActorRequest.yaml
@@ -50,3 +50,24 @@ properties:
     oneOf:
       - nullable: true
       - $ref: ./DefaultRunOptions.yaml
+  taggedBuilds:
+    type: object
+    description: |
+      Object containing the Actor's tagged builds, where the key is the tag name (e.g., _latest_) and the value is an object containing the build ID.
+      The object you provide will completely overwrite all existing tagged builds for the Actor.
+
+      - To create or reassign a tag: Include it in the object with the desired `buildId`.
+      - To remove a specific tag: Submit the object without that tag's key.
+      - To remove all tags: Provide an empty object: `{}`.
+      - If this field is omitted or `null`, the existing tags will not be changed.
+    nullable: true
+    additionalProperties:
+      type: object
+      required:
+        - buildId
+      properties:
+        buildId:
+          type: string
+    example:
+      latest:
+        buildId: z2EryhbfhgSyqj6Hn
diff --git a/sources/platform/actors/running/runs_and_builds.md b/sources/platform/actors/running/runs_and_builds.md
index e6176b1197..9accc07dae 100644
--- a/sources/platform/actors/running/runs_and_builds.md
+++ b/sources/platform/actors/running/runs_and_builds.md
@@ -17,7 +17,7 @@ An Actor is a combination of source code and various settings in a Docker contai
 A Docker image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries, and settings. For more information visit Docker's [site](https://www.docker.com/resources/what-container/).
 :::
 
-With every new version of an Actor, a new build is created. Each Actor build has its number (for example, **1.2.34**), and some builds are tagged for easier use (for example, _latest_ or _beta_). When running an Actor, you can choose what build you want to run by selecting a tag or number in the run options.
+With every new version of an Actor, a new build is created. Each Actor build has its number (for example, **1.2.34**), and some builds are tagged for easier use (for example, _latest_ or _beta_). When running an Actor, you can choose what build you want to run by selecting a tag or number in the run options. To change which build a tag refers to, you can reassign it using the [Actor update](/api/v2/act-put) API endpoint.
 
 ![Actor run options](./images/runs_and_builds/actor-run-options.png)