diff --git a/frontend/src/define.ts b/frontend/src/define.ts
new file mode 100644
index 0000000..7853694
--- /dev/null
+++ b/frontend/src/define.ts
@@ -0,0 +1 @@
+declare var __VERSION__: string;
diff --git a/frontend/src/types.ts b/frontend/src/types.ts
index 8c268cb..bd4a17f 100644
--- a/frontend/src/types.ts
+++ b/frontend/src/types.ts
@@ -1,5 +1,3 @@
-declare var __VERSION__: string;
-
 export namespace Api {
   export type BootstrapResponse = {
     file: string;