diff --git a/src/composables/useValidator.js b/src/composables/useValidator.js
index 3f9f00367..5ad96ea1b 100644
--- a/src/composables/useValidator.js
+++ b/src/composables/useValidator.js
@@ -30,6 +30,15 @@ export function useValidator() {
     const { t } = useI18n();
     const validations = function (validation) {
         return {
+            format: (value) => {
+                const { allowNull, with: format, allowBlank } = validation;
+                const message = t(validation.message) || validation.message;
+                if (!allowBlank && value === '') return message;
+                if (!allowNull && value === null) return message;
+
+                const isValid = new RegExp(format).test(value);
+                if (!isValid) return message;
+            },
             presence: (value) => {
                 let message = `Value can't be empty`;
                 if (validation.message)