diff --git a/group_vars/all b/group_vars/all
index d878a50..711adaf 100644
--- a/group_vars/all
+++ b/group_vars/all
@@ -6,6 +6,6 @@ bigboot_size: 1G
 # We use padding just to ensure there's
 # available space to expand /boot to.
 #
-# By default the value is 1.10, or 10%
+# By default the value is 1.05, or 5%
 # greater than bigboot_size
-bigboot_shrink_padding: 1.10
+bigboot_shrink_padding: 1.05
diff --git a/tasks/bigboot_manage_lv.yml b/tasks/bigboot_manage_lv.yml
index a50cb5d..4f94956 100644
--- a/tasks/bigboot_manage_lv.yml
+++ b/tasks/bigboot_manage_lv.yml
@@ -19,7 +19,7 @@
 
 - name: Capture shrink size for logical volume
   ansible.builtin.set_fact:
-    bigboot_lv_shrink_size: "{{ bigboot_lv_info.size_total - bigboot_expansion_diff | int }}"
+    bigboot_lv_shrink_size: "{{ bigboot_lv_info.size_total - bigboot_expansion_diff | human_to_bytes }}"
 
 - name: Capture logical volume name
   ansible.builtin.shell:
@@ -79,4 +79,4 @@
       vars:
         shrink_lv_devices:
           - device: "{{ bigboot_adjacent_lvm_device | trim }}"
-            size: "{{ bigboot_lv_shrink_size | int | human_readable | regex_replace('^(.*\\.\\d+)\\s+(\\w).*$', '\\1\\2') }}"
+            size: "{{ (bigboot_lv_shrink_size | int / bigboot_shrink_padding) | regex_replace('\\..*$', '') }}"