diff --git a/lib/api/reminders.ts b/lib/api/reminders.ts
index a419a8d..6615a8f 100644
--- a/lib/api/reminders.ts
+++ b/lib/api/reminders.ts
@@ -21,6 +21,9 @@ export const remindersApi = {
             if (value !== null && value !== undefined) {
                 if (key === 'data' && typeof value === 'object') {
                     formData.append(key, JSON.stringify(value));
+                } else if (typeof value === 'boolean') {
+                    // Laravel's `boolean` rule rejects the strings "true"/"false"; send 1/0
+                    formData.append(key, value ? '1' : '0');
                 } else {
                     formData.append(key, String(value));
                 }
@@ -53,6 +56,9 @@ export const remindersApi = {
             if (value !== null && value !== undefined) {
                 if (key === 'data' && typeof value === 'object') {
                     formData.append(key, JSON.stringify(value));
+                } else if (typeof value === 'boolean') {
+                    // Laravel's `boolean` rule rejects the strings "true"/"false"; send 1/0
+                    formData.append(key, value ? '1' : '0');
                 } else {
                     formData.append(key, String(value));
                 }