diff --git a/docs/api.md b/docs/api.md
index 8fc951c72..95118b4d1 100644
--- a/docs/api.md
+++ b/docs/api.md
@@ -86,6 +86,7 @@ The Cloud Hypervisor API exposes the following actions through its endpoints:
 | Restore the VM from a snapshot     | `/vm.restore`           | `/schemas/RestoreConfig`        | N/A                      | The VM is created but not booted                       |
 | Add/remove CPUs to/from the VM     | `/vm.resize`            | `/schemas/VmResize`             | N/A                      | The VM is booted                                       |
 | Add/remove memory from the VM      | `/vm.resize`            | `/schemas/VmResize`             | N/A                      | The VM is booted                                       |
+| Resize a disk attached to the VM   | `/vm.resize-disk`       | `/schemas/VmResizeDisk`         | N/A                      | The VM is created                                      |
 | Add/remove memory from a zone      | `/vm.resize-zone`       | `/schemas/VmResizeZone`         | N/A                      | The VM is booted                                       |
 | Dump the VM information            | `/vm.info`              | N/A                             | `/schemas/VmInfo`        | The VM is created                                      |
 | Add VFIO PCI device to the VM      | `/vm.add-device`        | `/schemas/VmAddDevice`          | `/schemas/PciDeviceInfo` | The VM is booted                                       |
diff --git a/vmm/src/api/openapi/cloud-hypervisor.yaml b/vmm/src/api/openapi/cloud-hypervisor.yaml
index d87573c55..1fa3d9b51 100644
--- a/vmm/src/api/openapi/cloud-hypervisor.yaml
+++ b/vmm/src/api/openapi/cloud-hypervisor.yaml
@@ -163,6 +163,22 @@ paths:
         429:
           description: The VM instance could not be resized because a cpu removal is still pending.
 
+  /vm.resize-disk:
+    put:
+      summary: Resize a disk
+      requestBody:
+        description: Resizes a disk attached to the VM
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/VmResizeDisk"
+        required: true
+      responses:
+        204:
+          description: The disk was successfully resized.
+        500:
+          description: The disk could not be resized.
+
   /vm.resize-zone:
     put:
       summary: Resize a memory zone
@@ -1203,6 +1219,17 @@ components:
           type: integer
           format: int64
 
+    VmResizeDisk:
+      type: object
+      properties:
+        id:
+          description: disk identifier
+          type: string
+        desired_size:
+          description: desired disk size in bytes
+          type: integer
+          format: int64
+
     VmResizeZone:
       type: object
       properties: