diff --git a/src/types/UniversimeApi.ts b/src/types/UniversimeApi.ts
index 9b6a574f..8aae9e80 100644
--- a/src/types/UniversimeApi.ts
+++ b/src/types/UniversimeApi.ts
@@ -1,8 +1,16 @@
-export type ApiResponse<ResponseBody = undefined> = {
-    success:     boolean;
+type ApiBaseResponse<Success extends boolean, ResponseBody = undefined> = {
+    success:     Success;
     message?:    string;
     redirectTo?: string;
     token?:      string;
-    body?:       ResponseBody;
-    alertOptions?: any;
+    body:        ResponseBody;
+    alertOptions?: {
+        [k: string]: string;
+    };
 };
+
+export type ApiSuccessResponse<SuccessBody> = ApiBaseResponse<true, SuccessBody>;
+export type ApiFailResponse<FailBody> = ApiBaseResponse<false, FailBody>;
+
+export type ApiResponse<SuccessBody = undefined, FailBody = undefined>
+    = ApiSuccessResponse<SuccessBody> | ApiFailResponse<FailBody>;