diff --git a/src/utils/commandComparing.js b/src/utils/commandComparing.js
index 5e0bfd1..9565871 100644
--- a/src/utils/commandComparing.js
+++ b/src/utils/commandComparing.js
@@ -1,3 +1,13 @@
+function normalizeDefaultMemberPermissions(value) {
+  if (value == null) return null;
+
+  if (typeof value === "object" && "bitfield" in value) {
+    return value.bitfield.toString();
+  }
+
+  return String(value);
+}
+
 module.exports = (existing, local) => {
   const changed = (a, b) => JSON.stringify(a) !== JSON.stringify(b);
 
@@ -5,12 +15,14 @@ module.exports = (existing, local) => {
     return true;
   };
 
-  if (
-    changed(
-      existing.default_member_permissions ?? null,
-      local.data.default_member_permissions ?? null
-    )
-  ) {
+  const existingPermissions = normalizeDefaultMemberPermissions(
+    existing.defaultMemberPermissions ?? existing.default_member_permissions
+  );
+  const localPermissions = normalizeDefaultMemberPermissions(
+    local.data.default_member_permissions ?? local.data.defaultMemberPermissions
+  );
+
+  if (changed(existingPermissions, localPermissions)) {
     return true;
   }
 
diff --git a/tests/command-comparing.test.js b/tests/command-comparing.test.js
new file mode 100644
index 0000000..2a2892c
--- /dev/null
+++ b/tests/command-comparing.test.js
@@ -0,0 +1,63 @@
+const { test } = require("node:test");
+const assert = require("node:assert");
+const commandComparing = require("../src/utils/commandComparing");
+const {
+  PermissionFlagsBits,
+  PermissionsBitField,
+  SlashCommandBuilder,
+} = require("discord.js");
+
+function makeLocalCommand(permission) {
+  return {
+    data: new SlashCommandBuilder()
+      .setName("ban")
+      .setDescription("Ban a user")
+      .setDefaultMemberPermissions(permission)
+      .toJSON(),
+  };
+}
+
+test("commandComparing treats matching discord.js permissions as unchanged", () => {
+  const local = makeLocalCommand(PermissionFlagsBits.BanMembers);
+  const existing = {
+    name: "ban",
+    description: "Ban a user",
+    options: [],
+    defaultMemberPermissions: new PermissionsBitField(
+      PermissionFlagsBits.BanMembers
+    ).freeze(),
+  };
+
+  assert.strictEqual(commandComparing(existing, local), false);
+});
+
+test("commandComparing detects default_member_permissions changes", () => {
+  const local = makeLocalCommand(PermissionFlagsBits.BanMembers);
+  const existing = {
+    name: "ban",
+    description: "Ban a user",
+    options: [],
+    defaultMemberPermissions: new PermissionsBitField(
+      PermissionFlagsBits.KickMembers
+    ).freeze(),
+  };
+
+  assert.strictEqual(commandComparing(existing, local), true);
+});
+
+test("commandComparing treats null and missing permissions as equivalent", () => {
+  const local = {
+    data: new SlashCommandBuilder()
+      .setName("ping")
+      .setDescription("Ping")
+      .toJSON(),
+  };
+  const existing = {
+    name: "ping",
+    description: "Ping",
+    options: [],
+    defaultMemberPermissions: null,
+  };
+
+  assert.strictEqual(commandComparing(existing, local), false);
+});