diff --git a/020_zfs-apt-snapshot.sh b/020_zfs-apt-snapshot.sh
index 9555387..f6429e7 100644
--- a/020_zfs-apt-snapshot.sh
+++ b/020_zfs-apt-snapshot.sh
@@ -24,7 +24,7 @@ DPkg::Pre-Invoke {"/usr/local/sbin/snapPrepApt || true";};
 EOF
 }
 conf_print_apt_conf_d | sudo tee /etc/apt/apt.conf.d/90zfs-pre-apt-snapshot
-chmod +x /etc/apt/apt.conf.d/90zfs-pre-apt-snapshot
+sudo chmod +x /etc/apt/apt.conf.d/90zfs-pre-apt-snapshot
 
 # 3. Kernel Updates
 # Use /etc/kernel/preinst.d/ to snapshot before kernel installation:
@@ -36,3 +36,4 @@ zfs snapshot -r ${POOL_NAME}@pre-kernel_${DATE}
 EOF
 }
 conf_print_kernel_preinst_d | sudo tee /etc/kernel/preinst.d/90zfs-pre-kernel-snapshot
+sudo chmod +x /etc/kernel/preinst.d/90zfs-pre-kernel-snapshot