diff --git a/src/main/events/themes/toggle-custom-theme.ts b/src/main/events/themes/toggle-custom-theme.ts
new file mode 100644
index 00000000..50440551
--- /dev/null
+++ b/src/main/events/themes/toggle-custom-theme.ts
@@ -0,0 +1,22 @@
+import { themesSublevel } from "@main/level";
+import { registerEvent } from "../register-event";
+
+const toggleCustomTheme = async (
+  _event: Electron.IpcMainInvokeEvent,
+  themeId: string,
+  isActive: boolean
+) => {
+  const theme = await themesSublevel.get(themeId);
+
+  if (!theme) {
+    throw new Error("Theme not found");
+  }
+
+  await themesSublevel.put(themeId, {
+    ...theme,
+    isActive,
+    updatedAt: new Date(),
+  });
+};
+
+registerEvent("toggleCustomTheme", toggleCustomTheme);