diff --git a/scripts/build-image b/scripts/build-image
index 193b362..7e3afe0 100755
--- a/scripts/build-image
+++ b/scripts/build-image
@@ -5,11 +5,8 @@ IMAGE="${1}"
 
 set -ex
 
-# Aim for a 4 GB card but with 5% unpartitioned as a margin
-# >>> (0.95 * 4000000000 // 512) * 512
-# 3800000000.0
 rm -f "${IMAGE}"
-fallocate -v -l 3800000000 "${IMAGE}" # 3,800,000,000 bytes
+fallocate -v -l 2GB "${IMAGE}" # 2,000,000,000 bytes
 
 parted -s "${IMAGE}" mklabel msdos
 parted -s "${IMAGE}" mkpart primary fat32 -- 4MiB 32MiB # 28 MiB (50,331,648 bytes)