diff --git a/docs/reference/api/generic-registry-api.md b/docs/reference/api/generic-registry-api.md
index e8a78bf5..5832e534 100644
--- a/docs/reference/api/generic-registry-api.md
+++ b/docs/reference/api/generic-registry-api.md
@@ -18,6 +18,7 @@ The official registry has some more endpoints and restrictions on top of this. S
 - **`GET /v0.1/servers/{serverName}/versions`** - List all versions of a server
 - **`GET /v0.1/servers/{serverName}/versions/{version}`** - Get specific version of server. Use the special version `latest` to get the latest version.
 - **`POST /v0.1/publish`** - Publish new server (optional, registry-specific authentication)
+- **`PUT /v0.1/servers/{serverName}/versions/{version}`** - Update specific server version (optional, not implemented by official registry)
 - **`DELETE /v0.1/servers/{serverName}/versions/{version}`** - Delete specific server version (optional, not implemented by official registry)
 
 Server names and version strings should be URL-encoded in paths.
diff --git a/docs/reference/api/openapi.yaml b/docs/reference/api/openapi.yaml
index c85dc425..aa5a3f3d 100644
--- a/docs/reference/api/openapi.yaml
+++ b/docs/reference/api/openapi.yaml
@@ -135,6 +135,95 @@ paths:
                   error:
                     type: string
                     example: "Server not found"
+    put:
+      tags: [publish]
+      summary: Update specific MCP server version (Optional)
+      description: |
+        Update a specific version of an MCP server in the registry.
+
+        **Note**: This endpoint is optional for registry implementations and is not implemented by the official MCP registry. It is included in the specification to standardize the update mechanism for registry implementations that choose to support it.
+
+        Authentication mechanism is registry-specific and may vary between implementations.
+      security:
+        - bearerAuth: []
+      parameters:
+        - name: serverName
+          in: path
+          required: true
+          description: URL-encoded server name (e.g., "com.example%2Fmy-server")
+          schema:
+            type: string
+            example: "com.example%2Fmy-server"
+        - name: version
+          in: path
+          required: true
+          description: URL-encoded version to update (e.g., "1.0.0" or "1.0.0%2B20130313144700" for versions with build metadata)
+          schema:
+            type: string
+            example: "1.0.0"
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/ServerDetail'
+      responses:
+        '200':
+          description: Successfully updated server version
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ServerResponse'
+        '401':
+          description: Unauthorized - Invalid or missing authentication token
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  error:
+                    type: string
+                    example: "Invalid or expired Registry JWT token"
+        '403':
+          description: Forbidden - Insufficient permissions
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  error:
+                    type: string
+                    example: "You do not have permission to update this server"
+        '404':
+          description: Server or version not found
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  error:
+                    type: string
+                    example: "Server version not found"
+        '500':
+          description: Internal server error
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  error:
+                    type: string
+                    example: "Failed to update server version"
+        '501':
+          description: Not Implemented - Registry does not support updates
+          content:
+            application/json:
+              schema:
+                type: object
+                properties:
+                  error:
+                    type: string
+                    example: "Updates are not supported by this registry"
     delete:
       tags: [publish]
       summary: Delete specific MCP server version (Optional)