diff --git a/showbits-thermal-printer-ui/src/components/CDocumentCells.vue b/showbits-thermal-printer-ui/src/components/CDocumentCells.vue
index 7c205e1..b1e9042 100644
--- a/showbits-thermal-printer-ui/src/components/CDocumentCells.vue
+++ b/showbits-thermal-printer-ui/src/components/CDocumentCells.vue
@@ -32,7 +32,7 @@ function submit() {
         v-model="rule"
         type="number"
         min="0"
-        max="127"
+        max="255"
         placeholder="random"
         :disabled
       />