diff --git a/libvirt-python/__main__.py b/libvirt-python/__main__.py
index eaea592..3eb24f2 100644
--- a/libvirt-python/__main__.py
+++ b/libvirt-python/__main__.py
@@ -19,7 +19,7 @@ baseimg = lv.Volume("base-image",
 volume = lv.Volume("disk",
     base_volume_id = baseimg.id,
     pool = pool.name,
-    size = config.require("disksize") * 1024 ** 3
+    size = int(config.require("disksize")) * 1024 ** 3
 )
 
 # Stream configuration files
@@ -39,7 +39,7 @@ vm = lv.Domain("debian11",
     ) ],
     cloudinit = cloudinit.id,
     disks = [ lv.DomainDiskArgs(volume_id = volume.id) ],
-    memory = config.require("memory"),
+    memory = int(config.require("memory")),
     network_interfaces = [ lv.DomainNetworkInterfaceArgs(
         network_name = "default",
         wait_for_lease = True