diff --git a/backend/services/snapshot-service/src/api/controllers/snapshot.controller.ts b/backend/services/snapshot-service/src/api/controllers/snapshot.controller.ts
index 8b8f75d7..1ec151ea 100644
--- a/backend/services/snapshot-service/src/api/controllers/snapshot.controller.ts
+++ b/backend/services/snapshot-service/src/api/controllers/snapshot.controller.ts
@@ -60,10 +60,12 @@ export class SnapshotController {
   @ApiQuery({ name: 'page', required: false, type: Number })
   @ApiQuery({ name: 'limit', required: false, type: Number })
   async listSnapshots(
-    @Query('page') page: number = 1,
-    @Query('limit') limit: number = 20,
+    @Query('page') page?: string,
+    @Query('limit') limit?: string,
   ) {
-    const result = await this.repo.findAll(page, limit);
+    const p = Math.max(1, parseInt(page || '1', 10) || 1);
+    const l = Math.min(100, Math.max(1, parseInt(limit || '20', 10) || 20));
+    const result = await this.repo.findAll(p, l);
     return {
       tasks: result.tasks.map(toSnapshotResponse),
       total: result.total,