diff --git a/virttest/qemu_capabilities.py b/virttest/qemu_capabilities.py
index 097c984f42..836dc6f392 100644
--- a/virttest/qemu_capabilities.py
+++ b/virttest/qemu_capabilities.py
@@ -31,6 +31,7 @@ class Flags(object):
     TDX_GUEST = _auto_value()
     FLOPPY_DEVICE = _auto_value()
     BLOCKJOB_BACKING_MASK_PROTOCOL = _auto_value()
+    DEVICE_OPTS_INT = _auto_value()
 
 
 class MigrationParams(object):
diff --git a/virttest/qemu_devices/qcontainer.py b/virttest/qemu_devices/qcontainer.py
index 841d125caf..0c505588ea 100644
--- a/virttest/qemu_devices/qcontainer.py
+++ b/virttest/qemu_devices/qcontainer.py
@@ -101,6 +101,7 @@ class DevContainer(object):
     SMP_DRAWERS_VERSION_SCOPE = "[8.2.0, )"
     FLOPPY_DEVICE_VERSION_SCOPE = "[5.1.0, )"
     BLOCKJOB_BACKING_MASK_PROTOCOL_VERSION_SCOPE = "[9.0.0, )"
+    DEVICE_OPTS_INT_VERSION_SCOPE = "[9.1.0, )"
 
     MIGRATION_DOWNTIME_LIMTT_VERSION_SCOPE = "[5.1.0, )"
     MIGRATION_MAX_BANDWIDTH_VERSION_SCOPE = "[5.1.0, )"
@@ -451,6 +452,9 @@ def _probe_capabilities(self):
             "migrate_set_parameter"
         ):
             self.caps.set_flag(Flags.MIGRATION_PARAMS)
+        # Some options are no longer accepted as string in device hotplug
+        if self.__qemu_ver in VersionInterval(self.DEVICE_OPTS_INT_VERSION_SCOPE):
+            self.caps.set_flag(Flags.DEVICE_OPTS_INT)
 
     def _probe_migration_parameters(self):
         """Probe migration parameters."""
@@ -3500,6 +3504,8 @@ def dimm_device_define_by_params(self, params, name):
         dev = qdevices.Dimm(
             params=dimm_params.copy_from_keys(attrs), dimm_type=dimm_type
         )
+        if Flags.DEVICE_OPTS_INT in self.caps and dev.get_param("node"):
+            dev.set_param("node", int(dev.get_param("node")))
         dev.set_param("id", "%s-%s" % ("dimm", name))
         for ext_k, ext_v in params.get_dict("dimm_extra_params").items():
             dev.set_param(ext_k, ext_v)
@@ -3564,6 +3570,11 @@ def memory_define_by_params(self, params, name):
                         parent_bus=virtio_mem_bus,
                         params=virtio_mem_params,
                     )
+                    if Flags.DEVICE_OPTS_INT in self.caps:
+                        for option in ["node", "requested-size"]:
+                            value = virtio_mem.get_param(option)
+                            if value:
+                                virtio_mem.set_param(option, int(value))
                     virtio_mem.set_param("id", "%s-%s" % ("virtio_mem", name))
                     devices.append(virtio_mem)
                 else: