diff --git a/katsu/modules/base/base-disk-aarch64.yaml b/katsu/modules/base/base-disk-aarch64.yaml
index 7de8afd..eba7099 100644
--- a/katsu/modules/base/base-disk-aarch64.yaml
+++ b/katsu/modules/base/base-disk-aarch64.yaml
@@ -31,7 +31,7 @@ scripts:
       file: default-target.sh
 
 disk:
-  size: 8GiB
+  size: 8GB
   partitions:
     - label: EFI
       type: esp
diff --git a/katsu/modules/base/base-disk-x86_64.yaml b/katsu/modules/base/base-disk-x86_64.yaml
index f954af0..4b7bdcc 100644
--- a/katsu/modules/base/base-disk-x86_64.yaml
+++ b/katsu/modules/base/base-disk-x86_64.yaml
@@ -31,7 +31,7 @@ scripts:
       file: default-target.sh
 
 disk:
-  size: 8GiB
+  size: 8GB
   partitions:
     - label: EFI
       type: esp