diff --git a/specs/composition/paths/compositions/updateSortingStrategy.yml b/specs/composition/paths/compositions/updateSortingStrategy.yml
new file mode 100644
index 00000000000..851a73ccd27
--- /dev/null
+++ b/specs/composition/paths/compositions/updateSortingStrategy.yml
@@ -0,0 +1,46 @@
+post:
+  tags:
+    - Compositions
+  operationId: updateSortingStrategyComposition
+  x-acl:
+    - editSettings
+  summary: Set or update the "sortingStrategy" configuration for an existing composition
+  description: |
+    Updates the "sortingStrategy" field of an existing composition.
+    This endpoint allows you to create a new sorting strategy mapping or replace the currently configured one.
+    The provided sorting indices MUST be associated indices or replicas of the main targeted index.
+
+    WARNING: This endpoint cannot validate if the sort index is related to the composition's main index.
+      Validation will fail at runtime if the index you updated is not related!
+
+    The update is applied to the specified composition within the current Algolia application and returns a taskID that can be used to track the operation’s completion.
+  parameters:
+    - $ref: '../urlParams.yml#/compositionID'
+  requestBody:
+    required: true
+    content:
+      application/json:
+        schema:
+          $ref: '../../common/schemas/components/Composition.yml#/sortingStrategy'
+  responses:
+    '200':
+      description: OK
+      content:
+        application/json:
+          schema:
+            title: taskIDResponse
+            type: object
+            additionalProperties: false
+            properties:
+              taskID:
+                $ref: '../../../common/responses/common.yml#/taskID'
+            required:
+              - taskID
+    '400':
+      $ref: '../../../common/responses/BadRequest.yml'
+    '402':
+      $ref: '../../../common/responses/FeatureNotEnabled.yml'
+    '403':
+      $ref: '../../../common/responses/MethodNotAllowed.yml'
+    '404':
+      $ref: '../../../common/responses/CompositionNotFound.yml'
diff --git a/specs/composition/spec.yml b/specs/composition/spec.yml
index 9216508ea71..c7e7ce1c504 100644
--- a/specs/composition/spec.yml
+++ b/specs/composition/spec.yml
@@ -136,6 +136,8 @@ paths:
     $ref: 'paths/compositions/composition.yml'
   /1/compositions/*/batch:
     $ref: 'paths/compositions/batch.yml'
+  /1/compositions/{compositionID}/sortingStrategy:
+    $ref: 'paths/compositions/updateSortingStrategy.yml'
 
   # ##########################################
   # ### Manage Composition Rules Endpoints ###
diff --git a/tests/CTS/requests/composition/updateSortingStrategyComposition.json b/tests/CTS/requests/composition/updateSortingStrategyComposition.json
new file mode 100644
index 00000000000..9aa759c562b
--- /dev/null
+++ b/tests/CTS/requests/composition/updateSortingStrategyComposition.json
@@ -0,0 +1,19 @@
+[
+  {
+    "parameters": {
+      "compositionID": "my-compo",
+      "requestBody": {
+        "Price-asc": "products-low-to-high",
+        "Price-desc": "products-high-to-low"
+      }
+    },
+    "request": {
+      "path": "/1/compositions/my-compo/sortingStrategy",
+      "method": "POST",
+      "body": {
+        "Price-asc": "products-low-to-high",
+        "Price-desc": "products-high-to-low"
+      }
+    }
+  }
+]