diff --git a/vhdbuilder/packer/vhd-image-builder-flatcar-arm64.json b/vhdbuilder/packer/vhd-image-builder-flatcar-arm64.json
index 57625b5dd53..9e1522bf614 100644
--- a/vhdbuilder/packer/vhd-image-builder-flatcar-arm64.json
+++ b/vhdbuilder/packer/vhd-image-builder-flatcar-arm64.json
@@ -41,7 +41,7 @@
       "virtual_network_subnet_name": "{{user `subnet_name`}}",
       "ssh_read_write_timeout": "5m",
       "os_type": "Linux",
-      "os_disk_size_gb": 30,
+      "os_disk_size_gb": 40,
       "image_publisher": "{{user `img_publisher`}}",
       "image_offer": "{{user `img_offer`}}",
       "image_sku": "{{user `img_sku`}}",
diff --git a/vhdbuilder/packer/vhd-image-builder-flatcar.json b/vhdbuilder/packer/vhd-image-builder-flatcar.json
index 93e5eb3485e..7480efd38b1 100644
--- a/vhdbuilder/packer/vhd-image-builder-flatcar.json
+++ b/vhdbuilder/packer/vhd-image-builder-flatcar.json
@@ -41,7 +41,7 @@
       "virtual_network_subnet_name": "{{user `subnet_name`}}",
       "ssh_read_write_timeout": "5m",
       "os_type": "Linux",
-      "os_disk_size_gb": 30,
+      "os_disk_size_gb": 40,
       "image_publisher": "{{user `img_publisher`}}",
       "image_offer": "{{user `img_offer`}}",
       "image_sku": "{{user `img_sku`}}",