diff --git a/image/autounattend_BIOS_template.xml b/image/autounattend_BIOS_template.xml
index 6e7e391..94b4e09 100644
--- a/image/autounattend_BIOS_template.xml
+++ b/image/autounattend_BIOS_template.xml
@@ -19,7 +19,7 @@
                         <!-- System partition -->
                         <CreatePartition wcm:action="add">
                             <Order>1</Order>
-                            <Size>100</Size>
+                            <Size>128</Size>
                             <Type>Primary</Type>
                         </CreatePartition>
                         <!-- Windows partition -->
diff --git a/image/autounattend_UEFI_template.xml b/image/autounattend_UEFI_template.xml
index 524f433..4e4c01e 100644
--- a/image/autounattend_UEFI_template.xml
+++ b/image/autounattend_UEFI_template.xml
@@ -21,14 +21,14 @@
                         <!-- Recovery partition -->
                         <CreatePartition wcm:action="add">
                             <Order>1</Order>
-                            <Size>500</Size>
+                            <Size>512</Size>
                             <Type>Primary</Type>
                         </CreatePartition>
                         <!-- EFI system partition (ESP) -->
                         <CreatePartition wcm:action="add">
                             <Order>2</Order>
                             <Type>EFI</Type>
-                            <Size>100</Size>
+                            <Size>128</Size>
                         </CreatePartition>
                         <!-- Microsoft reserved partition (MSR) -->
                         <CreatePartition wcm:action="add">